# \#gmc **URL:** https://community.cartalk.com/tag/gmc/326.md [Latest](https://community.cartalk.com/latest.md) · [Categories](https://community.cartalk.com/categories.md) · [Tags](https://community.cartalk.com/tags.md) --- ## [What is this box for?](https://community.cartalk.com/t/what-is-this-box-for/183768)
**Author:** [@Meadow](https://community.cartalk.com/u/Meadow)\ **Replies:** 15\ **Last updated:** [June 16, 2026, 8:07pm UTC](https://community.cartalk.com/t/what-is-this-box-for/183768 "2026-06-16T20:07:47Z")
Can anyone tell me what this device is and what it does. It blinks a green light constantly. There is a small oval shaped button on its face, but pressing it does not seem to produce a change in the blinking. --- ## [When it rains it pours, car trouble](https://community.cartalk.com/t/when-it-rains-it-pours-car-trouble/205685)
**Author:** [@Barkydog](https://community.cartalk.com/u/Barkydog)\ **Replies:** 16\ **Last updated:** [May 22, 2026, 9:01pm UTC](https://community.cartalk.com/t/when-it-rains-it-pours-car-trouble/205685 "2026-05-22T21:01:26Z")
So last week my side detection on 2017 GMC Acadia Ltd had a service soon. Made an appointment for Tuesday. So today battery completely dead, have a jump starter and could get a little revolution but not enough to turn ov… --- ## [Transmission/clutch not engaging. ](https://community.cartalk.com/t/transmission-clutch-not-engaging/203941)
**Author:** [@Broke\_joe](https://community.cartalk.com/u/Broke_joe)\ **Replies:** 4\ **Last updated:** [October 20, 2025, 2:12pm UTC](https://community.cartalk.com/t/transmission-clutch-not-engaging/203941 "2025-10-20T14:12:33Z")
Brand new issue in my 2016 sierra Z71. After I am stopped at a red light, the tachometer will rev up to near red with the slightest tap of the accelerator with no movement. Shifting into neutral will have the RPM behav… --- ## [Is my transmission done for?](https://community.cartalk.com/t/is-my-transmission-done-for/203935)
**Author:** [@Broke\_joe](https://community.cartalk.com/u/Broke_joe)\ **Replies:** 4\ **Last updated:** [August 27, 2025, 3:17pm UTC](https://community.cartalk.com/t/is-my-transmission-done-for/203935 "2025-08-27T15:17:35Z")
2016 Sierra, 103k mi, no error codes or lights. Without warning the clutch seems to completely disengage. I will loose every gear but Neutral. Taking the key out and starting it again fixes it for a time. Problems usual… --- ## [Help with Charging System Issue. Maybe? I think?](https://community.cartalk.com/t/help-with-charging-system-issue-maybe-i-think/200670)
**Author:** [@ryan\_193903](https://community.cartalk.com/u/ryan_193903)\ **Replies:** 10\ **Last updated:** [June 15, 2025, 3:23pm UTC](https://community.cartalk.com/t/help-with-charging-system-issue-maybe-i-think/200670 "2025-06-15T15:23:55Z")
Hey friends, so I have a 2007 Yukon Denali and a few weeks ago, the battery died. Truck wouldn’t start and the battery wouldn’t hold a charge on the trickle charger. It was an old battery, no harm, no foul, I bought a n… --- ## [1987 GMC S-15 Jimmy - Looking for mechanic](https://community.cartalk.com/t/1987-gmc-s-15-jimmy-looking-for-mechanic/200573)
**Author:** [@rosealan](https://community.cartalk.com/u/rosealan)\ **Replies:** 2\ **Last updated:** [June 10, 2025, 1:25pm UTC](https://community.cartalk.com/t/1987-gmc-s-15-jimmy-looking-for-mechanic/200573 "2025-06-10T13:25:41Z")
Need a mechcanic to work on a 1997 GMC S15 Jimmy. in the Lady Lake, FL area. --- ## [2010 GMC Terrain - ABS issues](https://community.cartalk.com/t/2010-gmc-terrain-abs-issues/199178)
**Author:** [@Daniel\_MichelleFaerber](https://community.cartalk.com/u/Daniel_MichelleFaerber)\ **Replies:** 1\ **Last updated:** [February 19, 2025, 7:38pm UTC](https://community.cartalk.com/t/2010-gmc-terrain-abs-issues/199178 "2025-02-19T19:38:40Z")
Does anyone else have problem with the ABS on the front of their 2010 GMC terrain on the right side replaced the pigtail and the sensor and it’s still coming up that it’s not working on the left side I just noticed it’s … --- ## [How to keep vent doors closed after engine is turned off](https://community.cartalk.com/t/how-to-keep-vent-doors-closed-after-engine-is-turned-off/199161)
**Author:** [@DJ44](https://community.cartalk.com/u/DJ44)\ **Replies:** 4\ **Last updated:** [February 16, 2025, 5:11pm UTC](https://community.cartalk.com/t/how-to-keep-vent-doors-closed-after-engine-is-turned-off/199161 "2025-02-16T17:11:33Z")
It appears that my 2013 GMC Terrain SLT-1 4-cyl FWD automatically opens the vent blend doors after a few minutes with the engine off - which is the case overnight, every night. In my older vehicles, I was able to manuall… --- ## [2014 GMC Terrain - Who is best to fix a cracked exhaust housing?](https://community.cartalk.com/t/2014-gmc-terrain-who-is-best-to-fix-a-cracked-exhaust-housing/199114)
**Author:** [@BobCBerwynIL](https://community.cartalk.com/u/BobCBerwynIL)\ **Replies:** 2\ **Last updated:** [February 13, 2025, 10:35pm UTC](https://community.cartalk.com/t/2014-gmc-terrain-who-is-best-to-fix-a-cracked-exhaust-housing/199114 "2025-02-13T22:35:20Z")
2014 gmc denali terrain 4 cyl exhaust housing cracked off now tail pipe is exposed. all else is functional . just the plastic cracked off. someone must have ran into it. --- ## [Fuel in EVAP vent line P0451 very low tank pressure](https://community.cartalk.com/t/fuel-in-evap-vent-line-p0451-very-low-tank-pressure/198670)
**Author:** [@PaintPaint](https://community.cartalk.com/u/PaintPaint)\ **Replies:** 34\ **Last updated:** [February 1, 2025, 2:54pm UTC](https://community.cartalk.com/t/fuel-in-evap-vent-line-p0451-very-low-tank-pressure/198670 "2025-02-01T14:54:01Z")
Hello everyone I am having some problems with a 2011 Yukon 6.2L Issue: Finding gas in evap vent lines not tied to overfilling. Cleaned/cleared and it returns very low fuel tank pressure readings (up to -4112pa) p045… --- ## [2017 Canyon Traction lights on intermittently](https://community.cartalk.com/t/2017-canyon-traction-lights-on-intermittently/198532)
**Author:** [@aldeneleven\_192343](https://community.cartalk.com/u/aldeneleven_192343)\ **Replies:** 40\ **Last updated:** [January 15, 2025, 3:28pm UTC](https://community.cartalk.com/t/2017-canyon-traction-lights-on-intermittently/198532 "2025-01-15T15:28:58Z")
I have a 2017 4 cyl 4WD GMC Canyon which has an intermittent problem. Sometimes ( 1 in 3) when I start the truck three lights stay on, 1) Traction Control system(StabiliTrak), 2) Traction control system Traction off lig… --- ## [2010 GMC Terrain - Reduced power](https://community.cartalk.com/t/2010-gmc-terrain-reduced-power/198654)
**Author:** [@jack40](https://community.cartalk.com/u/jack40)\ **Replies:** 2\ **Last updated:** [January 10, 2025, 9:58pm UTC](https://community.cartalk.com/t/2010-gmc-terrain-reduced-power/198654 "2025-01-10T21:58:07Z")
engine power is reduced and dont start rpm not working good t.y… --- ## [2015 GMC 3500 - odometer question](https://community.cartalk.com/t/2015-gmc-3500-odometer-question/198645)
**Author:** [@RodBurgess](https://community.cartalk.com/u/RodBurgess)\ **Replies:** 2\ **Last updated:** [January 10, 2025, 4:56am UTC](https://community.cartalk.com/t/2015-gmc-3500-odometer-question/198645 "2025-01-10T04:56:19Z")
Does the odometer revert back to 0 at 100,000 miles ? --- ## [1998 GMC Yukon - Sensor issues](https://community.cartalk.com/t/1998-gmc-yukon-sensor-issues/198385)
**Author:** [@Shovelhead1](https://community.cartalk.com/u/Shovelhead1)\ **Replies:** 3\ **Last updated:** [December 20, 2024, 3:04pm UTC](https://community.cartalk.com/t/1998-gmc-yukon-sensor-issues/198385 "2024-12-20T15:04:02Z")
Tool my yukon 1998 to oreileys the code reader read crankshaft sensor coolant sensor and egk sensor so I put a crankshaft sensor and still no crank. --- ## [2014 GMC 1500 - Sounds like it's running after turned off](https://community.cartalk.com/t/2014-gmc-1500-sounds-like-its-running-after-turned-off/198154)
**Author:** [@Nanaof11](https://community.cartalk.com/u/Nanaof11)\ **Replies:** 2\ **Last updated:** [November 27, 2024, 12:13am UTC](https://community.cartalk.com/t/2014-gmc-1500-sounds-like-its-running-after-turned-off/198154 "2024-11-27T00:13:20Z")
My 2014 GMC sounds like it’s still on after I turn off the truck and the keys are out. Why does it do that? Just started on Saturday. --- ## [2017 GMC Sierra 1500 - Slow battery drain](https://community.cartalk.com/t/2017-gmc-sierra-1500-slow-battery-drain/198118)
**Author:** [@Rich35](https://community.cartalk.com/u/Rich35)\ **Replies:** 3\ **Last updated:** [November 23, 2024, 7:25pm UTC](https://community.cartalk.com/t/2017-gmc-sierra-1500-slow-battery-drain/198118 "2024-11-23T19:25:39Z")
slow drain on battery, this is the second one in a year and a half. --- ## [P0711 Code: Can engine coolant thermostat issues cause this transmission coolant error?](https://community.cartalk.com/t/p0711-code-can-engine-coolant-thermostat-issues-cause-this-transmission-coolant-error/198034)
**Author:** [@OSR](https://community.cartalk.com/u/OSR)\ **Replies:** 3\ **Last updated:** [November 14, 2024, 6:30pm UTC](https://community.cartalk.com/t/p0711-code-can-engine-coolant-thermostat-issues-cause-this-transmission-coolant-error/198034 "2024-11-14T18:30:37Z")
I had what I thought were two issues going on simultaneously with my 2015 Yukon Denali. First, I got a check engine light and my scanner showed a P0711 code, which had something to do with the transmission temperature. … --- ## [DTC U0121 x 4. "4 modules not communicating to EBCM"](https://community.cartalk.com/t/dtc-u0121-x-4-4-modules-not-communicating-to-ebcm/190389)
**Author:** [@DJ44](https://community.cartalk.com/u/DJ44)\ **Replies:** 42\ **Last updated:** [November 12, 2024, 2:58pm UTC](https://community.cartalk.com/t/dtc-u0121-x-4-4-modules-not-communicating-to-ebcm/190389 "2024-11-12T14:58:15Z")
2013 GMC Terrain. Recap: BRAKE, ABS, TRAC lights on. “Service power steering message”, collision and lane depart not working, multiple new fully-charges and tested-good batteries die within 48 hours with car off. Cause o… --- ## [NOW what? GMC Terrain SLT LOUD noises ! And suggestions](https://community.cartalk.com/t/now-what-gmc-terrain-slt-loud-noises-and-suggestions/197850)
**Author:** [@remodeler](https://community.cartalk.com/u/remodeler)\ **Replies:** 26\ **Last updated:** [November 10, 2024, 10:32pm UTC](https://community.cartalk.com/t/now-what-gmc-terrain-slt-loud-noises-and-suggestions/197850 "2024-11-10T22:32:26Z")
Have only had my 2021 GMC Terrain SLT 2 months, almost to the day, and yet another unexplainable thing happens. 2 weeks ago I was in a Target parking lot. Came out of my parking spot and drove about 5 car lengths, havi… --- ## [GMC Terrain wiper blade adapter](https://community.cartalk.com/t/gmc-terrain-wiper-blade-adapter/197953)
**Author:** [@DJ44](https://community.cartalk.com/u/DJ44)\ **Replies:** 11\ **Last updated:** [November 9, 2024, 6:54pm UTC](https://community.cartalk.com/t/gmc-terrain-wiper-blade-adapter/197953 "2024-11-09T18:54:07Z")
Went to replace the wiper blades for the first time on this car, get out there open up the packages, slide the old ones off - no adapter in new box. Can’t get the old adapters off the old blades. New blades don’t fit wit… --- ## [2019 GMC Canyon - Consumes oil](https://community.cartalk.com/t/2019-gmc-canyon-consumes-oil/197635)
**Author:** [@2019Denali](https://community.cartalk.com/u/2019Denali)\ **Replies:** 11\ **Last updated:** [October 17, 2024, 1:55am UTC](https://community.cartalk.com/t/2019-gmc-canyon-consumes-oil/197635 "2024-10-17T01:55:20Z")
Uses one quart of oil, approximately every 2000 miles. Any suggestions on how to remedy it? Do not. appear to be smoking. --- ## [2015 GMC Sierra 1500 - Help with cylinder valves requested](https://community.cartalk.com/t/2015-gmc-sierra-1500-help-with-cylinder-valves-requested/197463)
**Author:** [@jsmith6610](https://community.cartalk.com/u/jsmith6610)\ **Replies:** 34\ **Last updated:** [October 8, 2024, 9:57pm UTC](https://community.cartalk.com/t/2015-gmc-sierra-1500-help-with-cylinder-valves-requested/197463 "2024-10-08T21:57:48Z")
\#7 CYLINDER valves stuck open engine running very rough --- ## [From mazda to gmc terrain slt](https://community.cartalk.com/t/from-mazda-to-gmc-terrain-slt/196142)
**Author:** [@remodeler](https://community.cartalk.com/u/remodeler)\ **Replies:** 36\ **Last updated:** [September 13, 2024, 10:49am UTC](https://community.cartalk.com/t/from-mazda-to-gmc-terrain-slt/196142 "2024-09-13T10:49:49Z")
So…found a car to replace my Mazda. (Sorry, this will be kinda long to read.) 2021 GMC Terrian SLT. I’m sure there are those that will say it’s not that good of a vehicle, but it has everything I wanted (and most things… --- ## [What vehicle can replace a Safari/Astro Van?](https://community.cartalk.com/t/what-vehicle-can-replace-a-safari-astro-van/42695)
**Author:** [@showland](https://community.cartalk.com/u/showland)\ **Replies:** 28\ **Last updated:** [September 8, 2024, 1:44pm UTC](https://community.cartalk.com/t/what-vehicle-can-replace-a-safari-astro-van/42695 "2024-09-08T13:44:26Z")
I've got a 2001 GMC Safari Van that has been a great vehicle for me. I'd like to replace it with something new next year, but can't think of another vehicle with the same overall abilities of this van, and the Safari van… --- ## [GMC Yukon XL - engine/trans stuttering at 1250-1750 RPM](https://community.cartalk.com/t/gmc-yukon-xl-engine-trans-stuttering-at-1250-1750-rpm/195688)
**Author:** [@TheSwedeMachine](https://community.cartalk.com/u/TheSwedeMachine)\ **Replies:** 10\ **Last updated:** [August 12, 2024, 9:44pm UTC](https://community.cartalk.com/t/gmc-yukon-xl-engine-trans-stuttering-at-1250-1750-rpm/195688 "2024-08-12T21:44:24Z")
Hi all, I have a question regarding the stuttering of my engine at in the range of 1250-1750 rpm and potential sources of the problem. Vehicle specs below, followed by the problem in more detail. Make: GMC Model: Yuko… --- ## [Stubborn two misfires?](https://community.cartalk.com/t/stubborn-two-misfires/193596)
**Author:** [@tristantb\_187477](https://community.cartalk.com/u/tristantb_187477)\ **Replies:** 13\ **Last updated:** [June 29, 2024, 9:37pm UTC](https://community.cartalk.com/t/stubborn-two-misfires/193596 "2024-06-29T21:37:17Z")
Howdy folks, me and my SO were living the vanlife for quite sometime and loving it but that very well might be coming to an end. A few days ago we were driving on the highway going about 60mph and i began to loss power q… --- ## [2016 GMC Sierra 1500 - Weird tire slits](https://community.cartalk.com/t/2016-gmc-sierra-1500-weird-tire-slits/194807)
**Author:** [@DonC51](https://community.cartalk.com/u/DonC51)\ **Replies:** 9\ **Last updated:** [April 30, 2024, 2:29pm UTC](https://community.cartalk.com/t/2016-gmc-sierra-1500-weird-tire-slits/194807 "2024-04-30T14:29:30Z")
I have a 2016 GMC Sierra Denali Ultimate w/ 125,000 miles. In May of 2021 with 73,841 miles I installed a set of Mickey Thompson Deegan 38 A/T tires. In Feb of 2024 I noticed a slit in the sidewall. Since I pull a 21’ Tr… --- ## [2021 GMC Yukon - Fuel pump and shifting to neutral trouble](https://community.cartalk.com/t/2021-gmc-yukon-fuel-pump-and-shifting-to-neutral-trouble/194265)
**Author:** [@bhd](https://community.cartalk.com/u/bhd)\ **Replies:** 3\ **Last updated:** [January 30, 2024, 10:15pm UTC](https://community.cartalk.com/t/2021-gmc-yukon-fuel-pump-and-shifting-to-neutral-trouble/194265 "2024-01-30T22:15:31Z")
anyone having problems with fuel pump module and stall situation with no possibility to put vehicle in neutral --- ## [Stuck brake drum. Not rusted](https://community.cartalk.com/t/stuck-brake-drum-not-rusted/193957)
**Author:** [@jkn](https://community.cartalk.com/u/jkn)\ **Replies:** 59\ **Last updated:** [December 10, 2023, 2:38pm UTC](https://community.cartalk.com/t/stuck-brake-drum-not-rusted/193957 "2023-12-10T14:38:58Z")
We have an old 92 Sierra C1500 Trying to do some brake work. The right rear drum popped right off. The left will not. It will move a bit, but something is catching it. It’ll move a bit but then just will not budge. … --- ## [PRE-OWNED 2021 GMC YUKON XL DENALI SUV 24k mil with Valve cover gasket replaced @ 14](https://community.cartalk.com/t/pre-owned-2021-gmc-yukon-xl-denali-suv-24k-mil-with-valve-cover-gasket-replaced-14/193796)
**Author:** [@mr\_xg78\_169308](https://community.cartalk.com/u/mr_xg78_169308)\ **Replies:** 14\ **Last updated:** [November 10, 2023, 1:20pm UTC](https://community.cartalk.com/t/pre-owned-2021-gmc-yukon-xl-denali-suv-24k-mil-with-valve-cover-gasket-replaced-14/193796 "2023-11-10T13:20:15Z")
Hi All, I want your advice on this Denali. A 21 Yukon XL denali that checkes all the boxes for me but on carfax had a gasket replaced @ 14K. and looks like it was being taken in for oil change evre 2-3K. After the gaske… [Next page](https://community.cartalk.com/tag/gmc/326.md?match_all_tags=true&page=1&tags%5B%5D=gmc)