1991 GMC Suburban - Answered Questions & Fixed issues

1-8-4-3-6-5-7-2

look for broken vacuum hose that runs the map sensor

There are TWO types of ignition coils a external that is bolted to the intake manifold in front of distributor. Internal this one is mounted on top of distributor cap. Remove holder ring for spark plug wires then remove protective cover 2 screws 7mm then remove the four screws that hold coil in place. there are three wires 1 red and 1 white these have a double spade connector on them remove with needle nose pliers the third has eyelet that screws down with one of the hold down screws. REMEMBER TO MARK THE POSITION OF THE SPARK PLUG WIRES THEY ONLY WORK IN THE RIGHT FIRING ORDER 18436572 clockwise rotation.

check out AA1car.com It helped me out a lot and it's free.. An awesome site if you are willing to search a bit. The coil is on top of the distributor cap. remove the top cover then the 4 small bolts holding it on. Unplug it fro the side, 3 wires... then just replace. Make sure to reinstall the ground wire that is located under one corner of the coil and held in place by the mounting bolt.

Under the dash in front of the glove compartment.

R12 to 134aUse Google & read up on how to do itGo to You Tube Video & watchLots of places to get what you need for thatInternet,auto parts store,hvac supply house

yes any parts store

If yours is like my 97 and 96 pick-ups then you need to set the parking brake first. Second tilt the steering wheel down as low as it will go. Third WITH THE ENGINE OFF take the gear selector and put it down into low gear. You can now gently pull on the dash bezel from the outside edges and it should pop out with a little GENTLE coaxing. There are about 10-12 separate clips around the outside edge holding the bezel in place. The headlight switch will come with it but it should pop out of the bezel from behind with a little of that gentle coaxing discussed earlier. If you have any switches in the dash between the radio and the instrument cluster they may have to be manually disconnected before the bezel will come completely away from the dash. Beware the hazard flasher popup switch in the top of the steering column as the bezel will catch on that and you can break it off pretty easily which will help encourage you to purchase and install a new multi-function switch along with whatever else you are doing today. After you get the bezel out the rest of the dash components are individually secured with screws or clips. Enjoy!

Check battery charge level. If OK, check electrical connections. Check voltage drop across starter.

tan with a white stripe located 1 under the passenger carpet near the middle of the hump in the floorboard 2 in the engine harness near the fuse relay center may have to peel the wire loom back to find it timing at (0) btdc with connector unplugged

Check the socket for power (with a 12 volt test light probe) to the pin that operates the running light bulb filiment, use the other tailight for a guide or just touch all the pins, one should light the test light up

The later cables are self adjusting, one way. Early ones have a horse clip. Yours should be self adjusters.

Go to the TB and locate the TV cable. Follow it to a bracket and yoiu will see a big plastic part snapped into the bracket that holds it in place. There should be a rasied plastic area with a metal D shaped button. Press on that button and push the cable back towards the cable housing. Then release the button and step on the throttle. It will make a ratchet noise and pull itself out as far as needed for a maximum tightness on the cable.

Are you refering to the ignition switch? If so email me at [email protected] and I will send step by steps with diagrams. No charge

If you mean the flash once and then twice flash code, That means the computer is good as far as being able to read codes. That's it. If you had any stored troub;e codes you would get the code 12 three times and then any stored codes would come after that. they also show up 3 times and then go to the next code if there are more then 1 codes stored. I hope this helps and good luck.

You need to measure the sway bar shaft. Call a gm dealer. Try autozone.

This is a indication that the brake rotors are warped and either need to be machined or replaced.

Pump is in the tank also it could be the spark module in under the distributor cap. Some time they heat up and shutdown. Once they cool it will start back up but some day it will quit for good.

If it has a three speed transmission yes. But it should have a 4 speed auto, and it isn't controlled by vacuum. It is controlled by a cable and the cable might need adjusted.

according to advance website your fuel pump is electric and inside the tank. the only pre-filter is thus the screen around the pump inlet. years of detritus can collect around them, but you are going to have to lower the tank and pull it out to see. it is 20 years old and a replacement would be in order anyhow if it has never been changed before.

If high mileage probably timing chain b/o