20 Most Recent 2004 GMC Sierra 2500 Questions & Answers

Verify all the battery cables are clean and tight, check for acid intrusion into the positive battery cable as well also check the battery cables at the starter and engine ground connections for being tight and having no corrosion.. Turn the nut and or bolts a 1/4 turn just to clean any possible corrosion under them.

GM has a service bulletin for this symptom.They say that in cold tempetures the blower control module fails also known as a linear control module. This only applies to vehicles with automatic temperture control.

Though I'm not familiar with the Diesel, most vehicles have two throttle cables. One is for the cruise and it's common for the plastic part at the end (throttle body) to break. This is the easiest fix, and very commonly the problem. Good Luck

Mine is located under the hood and located on the driver side in a fuse box at the top of the engine. Box is plastic and top snaps off.

Check, you may have a connection to the cluster not fully plugged in. It's got to be at the cluster-the instrument panel.

wiring harness ground faulty or engine ground strap possible

first find out what the loose wires are for trace them back or take a test light and have the key on then off to see if it has something to do with starting you may need to add a little more info for this one..sorry if this is not helpful 2 you

Either can cause the white smoke, but it's likely to be a head gasket. Of course, if you significantly overheated the engine, you also could have warped the head(s). Since the heads have to be pulled anyway, send them to a machine shop to be checked, trued-up and (possibly) shaved. Good luck.

try lifting the brake pedal with your toes then switching on the cc when driving. sometimes a faulty or loose switch on the brake pedal can cause cc to cut out.