1998 GMC Jimmy - Page 4 - Answered Questions & Fixed issues

There are several things that could cause a knock, ranging from a worn crankshaft bearing(s) to a worn water pump. You can further pinpoint this knock by defining if it occurs occasionally, constantly, just at a specific RPM, or only under a load. What kind of a knock is it? Hi-pitched or low-pitched? A more detailed problem description would yield you a more specific/helpful answer.

with engine running at normal operating temp tap on MAF sensor to see if it stumbles also try cleaning MAF sensor

check speed sensor in tran.

fuel pressure low could be filter or pump

if you hear a vacuum breach there could be a loose or broken hose, if you hear it inside the cab it may be in the A/C air flow controller, for this devices use the car vaccum to operate, but I am not sure that's what's causing it to loose power. sounds like a worn clutch. best luck to you.

IF IT IS REALLY GOING INTO PARK BUT INDICATOR SAYS IT IS NOT THEN THERE IS A PROBLEM WITH THE LINKAGE TO THE INDICATOR

replace the ignition lock cylinder, that should cure the problem, but u will need to have the VATS module re-programmed to accept the new VATS key resistance value, this is preformed by the dealer only.

vacuum issue, check for hose off at canister

did you change connector at fuel pump?

check alignment of all accessories

uh, no

located on side of throttle body

may be just a ground...check it

autozone.com, FREE

common, seen many time before...pump is on the way out, replace for piece of mind...

Use a socket 5/8 with swivel extension through wheel well. This is the best way to get to all the plugs via wheel well. You don't have to touch the steering shaft at all. I have done a tune up on mine more times than I can remember

If the lock tumbler pins are jamming the lock, you can try tapping on the lock while you twist it. If that does not work, you can perform other remedies when you get the lock exposed. You need to remove the whole thing and that is the hardest part. Once it is out of the column you can use gravity and tapping to see if the pins will move. IF you cannot get past the jammed cylinder, you can take it to a lock smith.

look for ABS trouble code first

need to scann system for fault codes

Find one on ebay or google it I would guess about 30 to 35 dollars