# \#sierra-1500 **URL:** https://community.cartalk.com/tag/sierra-1500/14266.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. --- ## [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… --- ## [Krown Rust Control](https://community.cartalk.com/t/krown-rust-control/177896)
**Author:** [@wrichter20](https://community.cartalk.com/u/wrichter20)\ **Replies:** 27\ **Last updated:** [July 13, 2021, 1:00am UTC](https://community.cartalk.com/t/krown-rust-control/177896 "2021-07-13T01:00:38Z")
Hi, First time using this forum, but I had a question about Krown Rust Control. Where I live there is Krown Rust Control center and I went in and talked to the guy about what Krown was. I got a lot of information but I… --- ## [2011 GMC Sierra not shifting when accelerating](https://community.cartalk.com/t/2011-gmc-sierra-not-shifting-when-accelerating/176679)
**Author:** [@Sundukov](https://community.cartalk.com/u/Sundukov)\ **Replies:** 5\ **Last updated:** [May 9, 2021, 8:36pm UTC](https://community.cartalk.com/t/2011-gmc-sierra-not-shifting-when-accelerating/176679 "2021-05-09T20:36:24Z")
Truck isn’t shifting when accelerating from 35 to 60mph unless I let off the gas. When accelerating on the highway to merge it will go all the way up to 6000 rpm then will shift if I let off the gas pedal. Changed transm… --- ## [2002 GMC Sierra 1500 - Slightly fluctuating RPMs](https://community.cartalk.com/t/2002-gmc-sierra-1500-slightly-fluctuating-rpms/165680)
**Author:** [@David5292\_150742](https://community.cartalk.com/u/David5292_150742)\ **Replies:** 10\ **Last updated:** [June 12, 2020, 8:20pm UTC](https://community.cartalk.com/t/2002-gmc-sierra-1500-slightly-fluctuating-rpms/165680 "2020-06-12T20:20:14Z")
I have a 2002 GMC sierra 1500, V6 4.3L. I am having an issue with the RPMs slightly fluctuating when accelerating. It does not seem to do it all the time. Or eventually it will go away for a while and come back when driv… --- ## [COVID car electrical problem--urgent help needed](https://community.cartalk.com/t/covid-car-electrical-problem-urgent-help-needed/161504)
**Author:** [@Eben\_Kirksey](https://community.cartalk.com/u/Eben_Kirksey)\ **Replies:** 9\ **Last updated:** [March 22, 2020, 8:15pm UTC](https://community.cartalk.com/t/covid-car-electrical-problem-urgent-help-needed/161504 "2020-03-22T20:15:52Z")
Hello! I just came down with COVID-19 symptoms yesterday (Saturday, March 21), and a truck that has critical supplies for me from Texas has made it 98% of the way last night, but won’t start this morning. The driver, a … --- ## [Possible vacuum leak and has misfire](https://community.cartalk.com/t/possible-vacuum-leak-and-has-misfire/144703)
**Author:** [@Trent\_Risley](https://community.cartalk.com/u/Trent_Risley)\ **Replies:** 2\ **Last updated:** [July 18, 2019, 6:20pm UTC](https://community.cartalk.com/t/possible-vacuum-leak-and-has-misfire/144703 "2019-07-18T18:20:22Z")
I got a 2000 gmc sierra 1500 5.3 v8. about 8 months ago it had some brake problems and i fixed them. new lines,calipers, pads, rotors and brake master cylinder. recently the trucks brakes went again and the truck is very…