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Prev Professional Automotive Repair Technical Discussions for February 2, 2006
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Open Help Requests for GM
Help Request Answers
1971 Buick electra 7.5L blinkers brake lights VIN: 484391H439
Hello, I would like to see if anyone could fax me a wiring diagram for this 71 electra. We dont have power going to the brake light and blinker circuit on the passenger rear side. We check for a shorted socket by testing voltage at the plug for all ther rear l...
1988 Buick LeSabre Limited 3.8L Poor Idle Quality, hard start VIN: 1G4HR54C2J
in the morning this vehicle is very hard to start pops thru intake clear flood and crank will some time start then all is ok till next morning checked for intermittant codes no codes at all could the cam or crank sensor be a problem that code wont show or if a...
1994 Buick Skylark Custom 3.1L egr VIN: 1G4NV55M6R
Hi all gurus out there! This one has us stumped AND all the experts around here are equally mystified. This is a regular, long-term customer that has traded with me for 10 years now. This 1994 Skylark failed emissions in November due to high NOX. A new Car-Que...
2000 Buick Century Custom 3.1L Cooling System VIN: 2G4WS52J9Y
There is a good amount of oil in the coolant system. The car, to my knowledge does not exhibit any running or overheat issues. We flushed the cooling system, but I expect the oil residue to come back. It is a 3100 gm motor. Someone said intake gaskets, but I d...
2002 Buick Rendezvous CX 3.4L security system VIN: 3G5DB03E22
Hello group, This vehicle is acting wierd.It has a problem where the security system intermittantly activates on it's own,causing the horn to spurt out several soft and short honks and then the rear hatch comes unlatched,causing the interior lights to stay on...
1999 Cadillac Catera 3.0L Passenger side cylinder head VIN: W06VR52R2X
We have a cadillac that is making us crazy. It came in last week with a check engine light on. It had codes P0300, 301, 303 AND 305, the misfire counter counts up on all three cylinders, tested injectors they ohm out ok and fuel pressure drop on all three cyli...
1987 Chevrolet Caprice 5.0L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G1BL51H5H
Hi, I have a caprice that I can't seem to get fix. The car came in runing bad skipping, backfireing, dieing I checked over the work that had been done when I pulled the dist. cap I the connector from the pick-up was gone and the terminals were curoded. I repla...
1995 Chevrolet Lumina 3.1L temperature gauge VIN: 2G1WL52M0S
this car came in because the customer noticed the temp gauge was reading 260 degrees after driving a few miles. we tested the gauge with an instrument gauge tester and determined the sending unit was defective. when replacing we found the sending unit was repl...
1996 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC5246T
Fuel pump & injectors have power when turn on key only
1999 Chevrolet C2500 5.7L Pinging VIN: 1GCGC24R0X
Engine spark knocks when engine is warm and under aload. Ive checked Timing, Fuel Pressure, MAP,MAf sensor,Plug wires,plugs,and did a top engine cleaning.
2003 Chevrolet Express 3500 6.0L Misfire VIN: 1GCHG35U23
Thanks in advance to all that reply to my situation. Kind of puzzled here, though i could find mis by switching components...no help still has mis on cylinders 2 and 6. Cylinder counter shows more misses than 6. I'm thinking a leaking intake or possible low co... Trouble codes: P0300
1994 GMC K1500 Suburban SLE 5.7L heater core VIN: 1GKFK16K5R
Hello all Again this GMC is back with another heater core leaking.. This will be the fourth one. Customer took to Chevy dealer and they told her they dont know why and they wanted to add a second heater core ground and charge her $440.00 not including the cor...
2000 GMC Sierra 1500 SL 5.3L Misfire, MIL Lamp on VIN: 1GTEC19T3Y
This pickup has random misfire on right bank only-mostly cylinder #6. Swapped #6 coil with #3-same result. Ignition system checks ok. Remove fuel rail & checked for moisture or debris-ok. Fuel pressure & filter are both fine, EGR & IAC check out fine. Problem ... Trouble codes: P0175, P0300
1999 Oldsmobile Alero GLS 3.4L abs VIN: 1G3NF12E9X
ABS and Trac light come on off at different times, so far i found bad wires at both front wheel speed sensors and a bad left front speed sensor, now if you drive the car and watch the speed sensors with the scanner everything works and looks fine but it still ...
1996 Pontiac Bonneville SE 3.8L Battery VIN: IG2H5216TH
This vehicle has an intermittant key off battery drain.It happens so seldom that I can't perform much diag. before it will go away and who knows when it will return. I have seen that the climate control center on the dash, the heads-up display and the blower m...
1999 Pontiac Grand Am SE 3.4L Front Calipers VIN: 1G2NE52E1X
I am not sure where to go next on this one. It has a soft sinking pedal and poor braking action. The customer has just installed new rotors and a set of ceramic pads in an effort to fix this problem. The first thing I did was to bleed the system following the ...
2001 Pontiac Aztek 3.4L Battery VIN: 3G7DA03EXI
Car came in with dead battery. We recharged battery & check electrical system. Alternator charging fine. We checked parasitic drain key off, we got 200 to 300 m.a. jumping up & down. I removed all the fuses one by one, the drain still there. Any body had any e...

Fixes & Summaries for GM
Fix/Summary Answers
1985 Chevrolet K20 Custom 5.7L timing VIN: 1GCCK24M3F
Hello and thanks to all for your ideas. I set this motor up at true top dead center using a piston stop to confirm. At true top dead center the balancer mark is lined up on the timing tab. This told me the lower part of the motor is set up right the balancer i...
1992 Chevrolet S10 Blazer Sport 4.3L 4wd VIN: 1GNDT13W8N
thanks to all it was the vac switch up buy the battry when uplugged it the 2 wires in the plug where green molded to gether left it uplugged and the lite never came on so we ordered a new one just came in today thanks again
1996 Chevrolet Blazer 4.3L engine VIN: 1GNDT13W7T
It seems like the motor did not last long. I got many replies on how sensitive the bearings are. My tech was very carefull when he did the intake job. I still dont fully know what happened. Customer agreed to replace motor with used one.
1996 Chevrolet Blazer 4.3L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1GNDT13W8T
Thanks for all the great help. I checked the EVAP sol and it worked ok, no voltage to it and no vacuum. That code didn't reset. I checked the EGR valve as some suggested but it was clean. The fuel pressure was 60 lbs, it should be 55-61 lbs and the fuel pump a... Trouble codes: P0172, P0175, P1441.
2000 Chevrolet C3500 7.4L Poor Fuel Economy VIN: 1GBKC34J1Y
yes the injectors were leaking. thanks to Kenneth [...] for information to call lindertech.com they said there is a problem with O.E. injectors leaking. they replace them with a boesh injector with life time warranty. Order them today hope they last.
2001 Chevrolet Express 3500 5.7L dome lights VIN: 1GCHG39R51
Well I appreciate the response that I got on this request,sounds like it is the wiring under the floormat that is the culprit. Unfortunetly the customer has yet to return for another look at the lights.Guess it wasn't as important as he claimed it was.We have ...
2001 Chevrolet Malibu LS 3.1L Keyless entry VIN: 1G1NE52J21
Thanks for your help. I tried a Genisys and it communicated fine. I then re-read the bulletin with a fresh mind and found that it really did apply to this car. Number 01-08-52-002A outlines a slightly different procedure for communcating and programing keyless...
2000 GMC Yukon XL 1500 SLE 5.3L key fobs VIN: 3GKFK16T6Y
Thanks for all the help.I verified the fobs had good batteries,clean switches,good signal,inspected all the grounds and anything else that was around the area of the washer resevoir,due to prior removal(when this all started).Everything seemed fine.Atlast,afte...
2003 GMC Sierra 2500 HD SLE 6.6L Check engine light VIN: 1GTHK23113
Thank you for the replies. I was very leery about performing repairs listed in the TSB, especially since the TSB does not explain at all why the repairs are to be made, it just states if you have these codes, do this. However after getting a reply stating that...
1998 Oldsmobile Bravada 4.3L Not sure VIN: 1GHDT13W0W
Once again I want to thank every body that responded to this request. For every one that said it was the p/s pully, you were right. We checked it and there was 3/16' of the shaft that was sticking out of the pully. We realigned it and presto, she is fixed. You...
2001 Pontiac Bonneville SLE 3.8L abs VIN: 1G2HY54K81
i not sure on the fix yet the lady is driving the car. thanks for all the help what i did find was water getting in connectors at both wheel speed sensors. so i sealed the connectors and drive it 70 miles in the rain with no problems.
2003 Pontiac Vibe 1.8L Misfire VIN: 5Y2SL62873
thanks for the help! i replaced the plugs and cleaned the injectors with a motorvac, and that seems to have fixed it. it passed emissions inspection, and the misfire codes have not returned so far. thanks again. Trouble codes: P0300, P0301, P0302.
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