20 Most Recent 2004 Chevrolet Silverado 1500 Crew Cab - Page 7 Questions & Answers

it sounds like its the engine speed censor, playing up
try looking at the mass air flow censor as well it is one of them thats doing this,,you could hook it up and read the fult codes that way it should take you right to it,

The engine is running rich, find what is causing the rich run and that will fix the rotten egg smell

You didnt say what size of engine you had, but in 5.3L the coolant temp sensor is located on the driver's side of the engine, just in front of the exhaust manifold. If you have a different engine, just leave a comment on here and i will update the location.

The above descriptions of the connector are very good. I washed the engine compartment yesterday, and immediately started getting the reduced enginer power code on the CIC, not performance. After reading several posts, I checked the connector on my 2003 2500HD, and found that the connector was not seated well and had gotten water in it. I cleared the water and the reconnected. The cables running from the fuse box to the connector are so short, the connector is in a bind and is pulled off-center. That is why the connector wasn't seated properly. The code went away, and the performance returned. By the way, be sure to do this after pulling the negative cable on your battery.

thats interesting, I plan on putting a HP CHIP in my 87 buick GN, but I know its not good to put super chip in, not intended for street vehicles. maybe its telling you to tone it down, maybe its telling you your engine may not handle this upgrade. or its not cpmpatable ! I would contact the manufactorer about this, they have a 1-800-number for tech questions . let me know

I HAVE THE SAME PROBLEM. CHANGED SWITCH AND THE SAME THING. I START THE TRUCK AND IS IN 4 HI. THEN HIT AUTO AND THEN 2WD THEN IT SHUTS OFF. AND SERVICE LIGHT COMES ON. STAYS IN 2WD. I CAN HEAR ACTUATOR WHEN TRUCK KEY IS TURNED AND CHANGE WHEN BUTTONS ARE PUSHED. I READ IT COULD BE GROUND UNDER DRIVER SIDE BAD. NEEDED TO BE CLEANED. I WILL TRY TOMORROW

temp blend door problem. either actuator motor bad, door broke inside heater box, or somthing interfearing with it closing. it could be an electrical issue w controller as well.

that light comes on when you either have a flat or low tire pressure. if its obviously not flat then you may have low enough tire pressure to have triggered the sensor. hope this helps

Is this correct, you have a silverado 1500 2004 that runs rough and black smoke out of exhaust, the check engine light on and how long has engine light been on?

you probably have a bad temp door actuator for the driver side, it will need to have the system rehomed after repair

this is a very big job to do.here is a video all chevy trucks are the same