Question about GMC Cars & Trucks
I check all visual inspection all done
Modules communicate back and forth on the CAN bus. Code U0100 indicates the PCM is not able to send or receive CAN communication signals. This should be diagnosed by a professional.
Posted on Dec 07, 2019
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Posted on Jan 02, 2017
YOU CAN CALL YOUR LOCAL DEALER, GIVE THEM THE VIN # AND THEY CAN TELL YOU THE CODE AND HOW TO DO IT FOR FREE.. GOOD LUCK KEITH..
Posted on Mar 12, 2009
Use this guide to help you find the color
Posted on May 25, 2010
Testimonial: "Thanks!!! I had checked there, but that part of them sticker is worn off. I should have been more clear. Thanks so much for taking the time to try and help. Have a great night!"
SOURCE: 1994 GMC 1500 Sierra 4.3
The distributor gear. It wears down and causes rough idling to no start. Pull the distributor, look where the rotor button is pointing as it needs to go in the exact same position. you can get just the gear and replace it. it is held in by a drive pin. Push it out and swap gears and reuse the drive pin. hammer it in.
Posted on Aug 17, 2011
SOURCE: ECM I fuse keeps blowing
For the ECM 1 fuse to open you obviously have a short to ground , start with the injector disconnected and see if ECM 1 fuse still blows.If it does disconnect crank sensor, also inspect wires for the injectors or any rub through wires here is a diagram
Posted on Sep 09, 2011
you have a wire grounding out somewhere. The only way I know how to find it quickly is not very safe and requires extra work later.
Posted on Jul 30, 2012
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