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1989 GMC K1500 - Page 4 Questions & Answers
1988 gmc k1500 wont start
hi, check the connections at the ecm,i think it's under pass front seat,i've had a couple of those years loose injector signal at ecm connector,if you have a test light you can unplug injectors and test across terminals ,it's a 12v signal at inj ,if lights flash on both while cranking try plugging in one at a time and see if either sprays, if one does and not the other, you would have a shorted injector
Condenser wont kick in
The condensor has no moving parts. It shouldn't kick in. Do you mean compressor? If so, look for low freon, bad low pressure switch, bad compressor clutch, bad.....
Turn signals don't work
i have a similar problem but my left signal works, when i turn the right on it just does an annoying buzz sound. if you can think of any explination for such shinanogins help would be greatly appreciated
11/25/2008 6:01:40 PM •
1989 GMC K1500
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1,694 views • 1 helpful votes
I have a 1991 gmc
There should be a digital ratio adapter controller (DRAC) between the speed sensor and the instrument cluster (IP) that may be faulty (or the IP itself is faulty). Try replacing the DRAC (should be installed on the ECM bracket under the dash). Be sure to disconnect the battery before doing this.
I have a 1999 GMC
overdrive servo/ solenoid is not operational , either from failed unit or wiring problem
check transmission actuator for operation or adjustment as well
1997 gmc k1500 seems to be running rich, very rich
If the engine is trying to flood, it will kill the engine. If you have the spider fuel system, it is noted for problems.
If it cranks good but won't start, have a helper crank it while you check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure, also, check fuel injector pulse.
I don't know if this may be a problem? below
Gm serpentine belt routing
There's a routing diagram sticker under the hood. Look for it on the radiator support , the front shock tower or on the hood itself.
type this on google and see what you get...gmc k1500 serpentine belt routing diagram
Brake failure
If you are talking about the brake pedal being stiff and too hard to push, then working easily again - it sounds like you temporarily lost the power assist. This will happen again and it is not safe to drive until properly repaired.
Many decades ago cars had no power assist and took much more foot pressure and much longer distance to stop. So your brakes were working, just not the assist.
The power assist is provided by a vacuum line from the engine. The likely causes of the failure are: stalling or stopped engine, leak in hose from engine to brake assist booster or leak in the diaphragm inside the brake booster. There are also other much less likely causes from brake fluid lines and the master cylinder. Regardless, don't drive knowing the brakes are likely to fail.
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