# 2000 Chevrolet Tahoe - Fuel pump appetite **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** chevrolet\ **Created:** [October 4, 2018, 5:43pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177 "2018-10-04T17:43:01Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![ReginaldHargrove](https://avatars.discourse-cdn.com/v4/letter/r/e56c9b/32.png) [@ReginaldHargrove](https://community.cartalk.com/u/ReginaldHargrove)\ **Post date:** [October 4, 2018, 5:43pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/1 "2018-10-04T17:43:02Z")
Hello I have a 2000 chevy Tahoe 5.3 liter engine. I’ve replaced my fuel pump 4 times changed all the lines and the relay as well. It wouldnt start 3 times I tapped the tank all 3 and it fired up. Could I possibly need to replace ecm? ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [October 4, 2018, 9:15pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/2 "2018-10-04T21:15:57Z")
> [@ReginaldHargrove](#): > > Could I possibly need to replace ecm? No, why? Do you think the ECM is killing your fuel pumps? ---
**Author:** ![ReginaldHargrove](https://avatars.discourse-cdn.com/v4/letter/r/e56c9b/32.png) [@ReginaldHargrove](https://community.cartalk.com/u/ReginaldHargrove)\ **Post date:** [October 4, 2018, 9:29pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/3 "2018-10-04T21:29:42Z")
Not really sure but someone suggested maybe the fuel pressure regulator could be my issue. ---
**Author:** ![ReginaldHargrove](https://avatars.discourse-cdn.com/v4/letter/r/e56c9b/32.png) [@ReginaldHargrove](https://community.cartalk.com/u/ReginaldHargrove)\ **Post date:** [October 5, 2018, 4:50pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/4 "2018-10-05T16:50:01Z")
Also when it doesnt want to crank I can tap on the tank and itll start up. ---
**Author:** ![eddo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/eddo/32/2594_2.png) [@eddo](https://community.cartalk.com/u/eddo)\ **Post date:** [October 5, 2018, 5:00pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/5 "2018-10-05T17:00:52Z")
what is fuel pressure when it won’t start? Is the pump working? Are you sure you’re installing the correct fuel pump? ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [October 5, 2018, 5:03pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/6 "2018-10-05T17:03:10Z")
Did you replace just the pump or the complete module, pump and housing? ---
**Author:** ![ReginaldHargrove](https://avatars.discourse-cdn.com/v4/letter/r/e56c9b/32.png) [@ReginaldHargrove](https://community.cartalk.com/u/ReginaldHargrove)\ **Post date:** [October 5, 2018, 5:09pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/7 "2018-10-05T17:09:10Z")
I’ll have to take it and get the pressure tested havent checked that but yes I’ve had it put in twice By a mechanic. ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [October 5, 2018, 5:19pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/8 "2018-10-05T17:19:47Z")
Dumb question. Did the mechanic do any diagnostic or just install fuel pump at your request ? ---
**Author:** ![ReginaldHargrove](https://avatars.discourse-cdn.com/v4/letter/r/e56c9b/32.png) [@ReginaldHargrove](https://community.cartalk.com/u/ReginaldHargrove)\ **Post date:** [October 5, 2018, 5:22pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/9 "2018-10-05T17:22:38Z")
Had diagnostic done at 90 bucks no issues in Virginia then drove to S.C. and it wouldnt Crank so my cousin tap on the tank and I did it fired up so here goes pump Number 4 or 5 now lost count and now it does the same thing still… ---
**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\ **Post date:** [October 5, 2018, 5:27pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/10 "2018-10-05T17:27:28Z")
I would be looking at the electrical connector for the pump. ---
**Author:** ![ReginaldHargrove](https://avatars.discourse-cdn.com/v4/letter/r/e56c9b/32.png) [@ReginaldHargrove](https://community.cartalk.com/u/ReginaldHargrove)\ **Post date:** [October 5, 2018, 5:29pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/11 "2018-10-05T17:29:04Z")
Thanks Twin Turbo I’ll definitely try that especially since it doesnt cost me to do that!! Lol ---
**Author:** ![shanonia](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@shanonia](https://community.cartalk.com/u/shanonia)\ **Post date:** [October 5, 2018, 6:33pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/12 "2018-10-05T18:33:56Z")
> [@ReginaldHargrove](#): > > it wouldnt > Crank Not cranking (turning over) means the starter motor is not engaging the flywheel and rotating the crankshaft. Knocking on the gas tank can wake up a fuel pump but probably has no effect on the starter motor and its circuitry. Does it always crank (turn over) but sometimes fail to start? ---
**Author:** ![ReginaldHargrove](https://avatars.discourse-cdn.com/v4/letter/r/e56c9b/32.png) [@ReginaldHargrove](https://community.cartalk.com/u/ReginaldHargrove)\ **Post date:** [October 5, 2018, 6:47pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/13 "2018-10-05T18:47:06Z")
My apologies for not using the correct terminology. Yes it turns over just fails to Start it may even attempt to run for a few seconds then does. I tap The tank it runs. ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [October 5, 2018, 7:01pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/14 "2018-10-05T19:01:16Z")
There are a lot of cheap knockoff fuel pumps out there for sale. They will get the car running but won’t last. Maybe upping the quality of the pump would help. ---
**Author:** ![ReginaldHargrove](https://avatars.discourse-cdn.com/v4/letter/r/e56c9b/32.png) [@ReginaldHargrove](https://community.cartalk.com/u/ReginaldHargrove)\ **Post date:** [October 5, 2018, 7:26pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/15 "2018-10-05T19:26:29Z")
It’s an AC Delco pump from Autozone the very first time the Pump was actually bad. ---
**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\ **Post date:** [October 5, 2018, 8:55pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/16 "2018-10-05T20:55:23Z")
I’m in agreement with TwinTurbo about the electrical connection. A fuel pump is a high current consumer and over time that can lead to burning and corrosion at the pump connector. That’s why parts manufacturers produce these. [https://www.autozone.com/electrical-and-lighting/fuel-pump-harness-connector/delphi-fuel-pump-harness-connector/459018\_771858\_0](https://www.autozone.com/electrical-and-lighting/fuel-pump-harness-connector/delphi-fuel-pump-harness-connector/459018_771858_0) ---
**Author:** ![ReginaldHargrove](https://avatars.discourse-cdn.com/v4/letter/r/e56c9b/32.png) [@ReginaldHargrove](https://community.cartalk.com/u/ReginaldHargrove)\ **Post date:** [October 5, 2018, 9:03pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/17 "2018-10-05T21:03:23Z")
Well looks like I’ll be purchasing one and installing it so I can stay away from this issue thanks ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [October 5, 2018, 9:09pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/18 "2018-10-05T21:09:31Z")
The AC Delco fuel pump assembly from Autozone comes with the harness pigtail, did you install it? ---
**Author:** ![ReginaldHargrove](https://avatars.discourse-cdn.com/v4/letter/r/e56c9b/32.png) [@ReginaldHargrove](https://community.cartalk.com/u/ReginaldHargrove)\ **Post date:** [October 5, 2018, 9:12pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/19 "2018-10-05T21:12:17Z")
Never installed in fact I think it’s been riding state to state with me the past 2 weeks ---
**Author:** ![ledhed75](https://avatars.discourse-cdn.com/v4/letter/l/f6c823/32.png) [@ledhed75](https://community.cartalk.com/u/ledhed75)\ **Post date:** [October 5, 2018, 10:42pm UTC](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177/20 "2018-10-05T22:42:01Z")
I and other people I’ve known have long had issues with Chevrolet/GM fuel pumps going out repeatedly. It’s generally on models from the late 90s to early 2000s. I have no idea what causes it, but I know they tend to go out unexpectedly, and it costs about $700 plus a tow to get it fixed. I know one guy who cut a hole in the bed of his truck so he could access the fuel pump without having to drop the tank. [Next page](https://community.cartalk.com/t/2000-chevrolet-tahoe-fuel-pump-appetite/126177.md?page=2)