I have a 2003 Silverado LT with 175k miles. For the last 6 months or so, if I try to drive my truck before the engine gets to full running temp, the check engine light will come on, the power locks will go on and off, and I will get a display on my dash that says reduced engine power, which does not allow me to go over 25 mph. It also says I need to check my breaks and the ABS indicator comes on. I have brought my truck to AutoZone to check for faults, but it says no faults detected. All of these issues can be avoided if I let my truck warm up for 20 mins before driving, but that is a huge waste of fuel and an inconvenience. Has anyone else had similar problems or have any ideas about what could be wrong and how to fix this issue?

 

Welcome to the forum...
I'd start by checking all of my battery and ground connections, a poor ground can cause similar issues, be sure to check the engine to chassis/body strap..
Clean and tighten all connections, replace any corroded cables...

 

Ill look into it. Thanks for the feedback.

 

UPDATE:
So, everything got worse today, as we started to get our first winter weather. Brought the truck back to autozone to get the erroe codes re-run, and this is what all came up:
c0226
c0237
c0236
c0281
c0291
c0305
c0306
c0327
c0374
c0379
u1214
b2725
p1518

As far as I can tell, this means that I am having a few problems with the ECM and TAC as well as some wheel sensor issues. So, I have to bring the truck into the dealership and see if they can just flash the ECM or replace it. Hopefully that will keep me running for a bit.