20 Most Recent 1992 GMC Sierra - Page 6 Questions & Answers

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If you check engine light is not on then you will have to do some checking. The above article should help. the MAF sensor may be dirty or your plugs are worn out. Clogged air filter? Oxygen sensor?

change the grounhed wire or run a second ground directly to the bolt on one of one of the seats as this goes directly to frame

To the chassis somewhere or maybe the engine. Follow it from the battery to find the point of connection.

There are two ways to check this problem. With engine off, grab fan and spin it. If it takes a minute or so to stop, or feels easy to spin, the clutch may be bad. The other way to check is to start engine, and using a long metal pipe (or lug wrench) insert into fan. If it stops spinning, then the clutch is bad. If using the second method, be certain that engine is idling...DO NOT ACCELERATE!!!

try plugging the wires back and check your fuses

Hello
In the picture below is number 14 the block you refer to?

If you have got taller tires on then what it came with from the factory it will definitly throw the speedometer off.You will need it to be recalibrated for a different speedometer gear put in the transmission.This will correct the odometer

On the side of the transmission.

IF ORIGINAL STEREO SHOULD BE IN FUSE BOX UNDER DASH DRIVERS SIDE

Let us deal with the two very separate problems here.
The problem with the blower motor is that the blower motor speed control resistor is burned out, when this happens all you will have is high speed setting. The blower motor speed control resistor is located right next to the blower motor in the air ducting. It has an electrical connector going to it with 3 wires, the resistor is roughly oval shaped and would easily fit in the palm of your hand. It is held into the air duct work by two screws. See picture below.


I will deal with the radio issue in a separate reply

There should be a schematic on the lid of the fuse box that tells you what each fuse is for, and the size of the fuse.

The stabilizer bar bushing are rubber bushing that wrap around the stabilizer bar. The bushings are located where the stabilizer attaches to the body and wheel control arms. A service manual from an auto parts store will provide exact location.