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6.5
fairly significant- Typical Repair Cost:
- No data
- Average Mileage:
- 186,800 miles
- Total Complaints:
- 4 complaints
Most Common Solutions:
- not sure (4 reports)
engine problem
Helpful websites
- No one has added a helpful site for this 2003 Silverado 2500 problem yet. Be the first!
A D V E R T I S E M E N T S
My 2003 Silverado 2500HD has been the very best vehicle I have ever owned. The only problems up to now have been normal wear and tear parts replacement. One day on the way home from work, the engine light came on, the bell rung, and the message board said "Reduced Engine Power". The engine was still running, but the throttle would not respond. I pulled over shut it off. Checked all the essentials (oil, coolant, air flow, ALL fuses) and found nothing. I started it back up after a few minutes and it was fine.
The next day, same thing. Shut if off and waited 15 min and off I went. The next time it happened I plugged up my "cheap" code reader and got "P1516, Command vs. Actual Throttle Position Correlation (TAC Module) Error". I cleared the code and everything was fine again. I looked up some forums and found everything from replace Throttle Positioning Sensor, Throttle Body clean/replace, re pin connector at throttle body, Mass Air Flow Sensor clean/replace, clean ground wires G103 and G104, reprogram PCM, or even replace the entire wiring harness and not one person who did some of these or even all of these had a permanent fix.
I cleaned my throttle body, cleaned my (spotless) mass air flow sensor, unplugged the throttle positioning sensor and got a different code. I cannot find an answer anywhere. Every shop says, replace the throttle body. I have seem tons of people report that online with zero results. It would only every occur under 40 degrees outside temp and as fast as I can clear the code, I am back to driving with no issues.
Now it happens in varying temps, but still mostly under 40 degrees outside temp. It did happen in the 60's 2-3 times over a short period. I am at a complete loss and am not ready to replace half of the engine to try to find the problem. For now, I can drive with a code reader hooked up and it takes exactly 12 sec to clear the code and I'm driving again.
- basscast84, Hayes, VA, US