20 Most Recent 1991 Chevrolet Silverado 2500 - Page 5 Questions & Answers

You have a bad ground. Ground is in the back wiring harness and goes to frame rail.

STOP!!

Drive shaft need to be MARK before dis-assembly.

Drive shaft is a balance item. Just like your tire.

PLEASE make a lot of ID marking before taking it off the truck.

Look for C clip on the outside of the U joint. Some unit will c-clip tool to take apart.

My guess would be the same as yours. Good job.

Hi ,
Sounds like you burned a "fuse able link". If you open your hood and look going away from the battery at all the wires you probably will see which wire melted. These links are designed to prevent major wiring harness fires. So you have a major dead short in your wiring. It would be difficult to lead you through the tracing down of the short but with a careful eye you may be able to see the bad wire as it will show signs of arcing. Good Luck!!!!!

replace idel possition sensor

check all vacum lines

ok check the coil and take modulater off take to parts house check to see if modulater is bad if it is replace your good to go

May sound funny.. Check the poll piece in the dist. under the rotor button. The magnet should be smooth. If it it is all messed up, may be your problem

This problem can be several things. When your engine is cold, your computer is in a "closed loop" and just pretty much keeps the engine running until warmed up. After reaching operation temperature, the computer starts reading all the sensors. If one sensor is not connected or is defective, you will experience performance problems. Most of the time this will turn on the check engine light, but not always. Second is the fuel pump. This too will cause erratic engine problems.

There are two power wires to your radio. One is hot when you turn on you ignition the other is hot when you turn on your lights. (this is for the dash lights). If these wire are backwards, it would cause this problem.

Most electrical problems are caused by bad grounds. Since your battery is grounded to your engine, make sure your engine is grounded to your chassis. I have seen battery terminals replaced and the small ground wire to the chassis was not connected back.

It sounds like the ground wire was left off at the bell housing when the tranny was replaced.

2wd or 4wd, 1500, 2500, 3500, 4.3, 5.0, 5.7, 6.2, 7.4 ? need information along with email address to send directions to replace starter

May have spun a bearing
remove one wire at a time and listen.
if the noise goes away thats the cylinder.

run a positive jumper cable from the + battery post to the starter post if it turns over replace battery cable. also check ground cable

that sounds like it in the coil pull the coil out and check for cracks while ua at it pull out the ignition module and replace the electric compound grease that is located under ignition module

hi, the problem you are having sounds to me like the oxygen sensor " or lambda sensor for its real name" has failed and needs replacing the reason it points towards this being the fault is that the oxygen sensor only starts working once the engine reaches a certain temp so if your car runs perfect from cold but plays up when warm then this is a good indication that the oxygen sensor needs replacing.

Let me know how you get on or if you need further assistance ok

Its probably a safety device. GMs do that.