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Prev Professional Automotive Repair Technical Discussions for November 10, 2004
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Open Help Requests for GM
Help Request Answers
1994 Buick Century Custom 3.1L MIL Lamp on VIN: RRR6425548
Codes will set after driving a while and pcm will see solinoids fail. Pcm will set codes for the #3 solinoid first, then set code for #2 solinoid next. I can ground out each solinoid and cause egr to work and notice a drop in rpm with each one. I can test driv... Trouble codes: P1404, P1405
1994 Buick Park Avenue 3.8L Transmission VIN: 1G4CW52L6R
Vehicle came in on tow, with specific problem of NO REVERSE. I verified complaint with no reverse cold or hot, doesn't even sound like it engages. Took line pressure readings posted below. All look normal at idle but low at full throttle. Scanned and received ...
1997 Buick Park Avenue 3.8L fuel guage VIN: 1G4CW52K3U
This car had a failed attempt to jump start, finally new battery was installed. Since then fuel gauge is all the way around and sits on the bottom side of the empty peg. Scan data shows accurate indication of fuel level, and fuel used data on dash is accurate....
1994 Cadillac DeVille 4.9L fuel gauge and turn signals VIN: 1G6KD52BSR
Vehicle came in with complaint of fuel gauge showing E (with plenty of fuel in tank} and turn signals not working. Problem occured rarely. Cleaned all grounds I could find and problem appeared to be solved. Vehicle came back one week later with same problem ex...
1990 Chevrolet Lumina 3.1L No Start, tries to start VIN: 2G1WN14T1L
The problem is a crank no/start. I have comunication with computer and no codes. I have all the basics fire, injector pulse, spark, cranking rpms, oil pressure, and everything I have checked checks out ok. The car cranks and tries to start but will not.
1995 Chevrolet Lumina 3.1L engine
Sorry this is long winded but I will give you the whole history on car. Customer had vehicle in to check for overheating concern. Diagnosed as possible bad head gasket and customer tore heads off himself- very capable to do this, third time he has pulled 3.1 h...
1996 Chevrolet Astro 4.3L Excessive Emissions, Poor Idle Quality VIN: 1GBDM19WTB
fuel pressure when running at 78-80 psi.engine rich.remove fuel return line and run into fuel can at engine intake manifold connection-pressure maintains 80 psi.regulator changed twice with same results.i wonder if plastic injector body could be at fault.there... Trouble codes: 172 (rich exhaust), 175 (rich exhaust)
1997 Chevrolet K1500 Cheyenne 5.7L Heater core VIN: 2GCEK19R4V
It seems that many technicans have seen this problem before. Looking at the data base you would think someone has the answer. I have changed 10+ heater cores. Some last a month most last less than a week. I have flushed the coolant and insured ph and voltage a...
2002 Chevrolet Impala LS 3.8L Poor Idle Quality VIN: 2G1WH55K42
the plastic upper intake plenum is melted through. the burn is above the egr passage that is directed at the top of the plenum. i can put on a new plenum, but what is the cure for correcting the problem? my local dealer doesn't have any tsb's on the problem an...
2002 Chevrolet Astro LS 4.3L MIL Lamp on VIN: 1GNDM19XX2
We service a fleet of nine 2002 and 2003 Astro vans. They have between 40k and 90k miles. Most of the vans have arrived with the mil light on. They store code PO442. Small evaporative emmisions leak. We have gone through all the tests but to no avail. Has anyo... Trouble codes: P0442
1996 GMC C1500 Suburban 5.7L Steering VIN: 1GKEC16R6T
Hey All, Another GM product out to get me. The truck came in with a hard to turn problem when parking and low speed turns. replaced above parts for leaks. Pump is acdelc reman, lines are new aftermarket. The problem is still here after these repairs. Here is ...
1997 GMC Jimmy SL 4.3L No Start VIN: 1GKCS18W6V
This vehicle came in friday with no start.Customer has replaced module, tune up parts and cam sensor in dist. I replaced crank sensor with no change.I have no pulse at module.I have all powers and grounds.According to trouble tree as per aldata I have a bad co... Trouble codes: 1361 (no crank signal)
1994 Oldsmobile 98 Regency Elite 3.8L alternator VIN: 1G3CW52L5R
Hi guys - I have this 94 olds 98 3.8L (non supercharged) which stops charging. This condition is present only at idle with transmission in gear (park or reverse). The vehicle will charge at around 13.7-14.2 volts and then drop instantly to 12 or 11 volts. The ...
1986 Pontiac Firebird 5.0L No Start
This car has good fuel pressure, good spark, but a very weak noid signal.Owner complained of hard starting when cold, and I experienced that two weeks ago.But now it won't start altogether.I tried a known good computer, no luck.Allgrounds seem to be good. Any ...
1996 Pontiac Grand Am GT 3.1L anti-theft VIN: 1G2NW52M3T
Thanks for checking this one out! This car originnaly came in with a complaint of no start with anti-theft light on. When vehicle was towed in, it started up for us. It had a code po1629 stored. The key was worn so we suggested a new dealer cut key. It did not...
1996 Pontiac Grand Am SE 3.1L no start VIN: 1G2NES2M2T
I know that I am just missing something, but after installing used engine. Will not turn over, removed and tested starter, check all wiring connections. Check for codes. None. Tried resetting key, for alarm system. When key turned to start postion, no lights d...
1997 Pontiac Trans Sport 3.4L speedometer VIN: 1GMDX03E1V
A local transmission shop called me to look at speedometer that on the hoist starts working in drive after about 20-30 seconds and then shifts fine. Speedometer works instantly in reverse. Scoped the pattern of the VSS at PCM, looked perfect, in D and R. Trans...
2002 Pontiac Grand Prix SE 3.8L Excessive Emissions, Surge, ACCELARATION VIN: 1GWP52K62F
Hi,one and all help ! 9o mph. and still trying to accelerate ! panic time the customer has tried to gain control with the brakes to no avail. the dealer can't find anything. the only way to stop is to turn off ignition. this inntermintent condtion will also t...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Park Avenue 3.8L oil warning lamp VIN: 1G4CW52L5W
Well, sorry for not being able to get back to you all until now. Our client has not been able to bring the vehicle back to get us to check it out again. I am armed with a psi gauge (neither of my two new mech's had one either) and a wiring diagram. She is afra...
1992 Cadillac DeVille 4.9L Cuts out, Stall, MIL Lamp on VIN: 1G6CD53B7N
Thank you to all that responded. Although the car ran well most of the time the problem was the fuel injectors. They all past ohm and balance tests but 3 failed during a hot current ramp test. This was causing a shorted condition in the pcm that shut it down a...
1997 Cadillac Eldorado 4.6L right marker/tail VIN: 1G6EL12Y7W
There are seperate fuses for the right side tail lamps and the left side tail lamps. These fuses are in the trunk compartment fuse box. They are both 10 amp.It was the fuse.What a bonehead
1999 Chevrolet Astro 4.3L Misfire, MIL Lamp on VIN: 1GCDM19W6X
It turned out to be a bad distributor cap, the aftermarket cap that was replaced a couple of months ago had high resistance (10,000 ohms)in the coil to center electrode circuit, the cam crank timing is still out 15 degrees but it dosn't seem to effect driveabi... Trouble codes: P0300 (Multiply Cylinder Misfire).
1999 GMC K1500 Suburban SLE 5.7L brakes sticking VIN: 3GKFK16R1X
Well, This one is fixed! Thank you one and all for your response. I received over 20 responses on this. Bottom line is the brake booster was the culprit. I had many responses that thought the booster was the problem. I also learned a few other things that are ...
1993 Pontiac Bonneville SE 3.8L Fuel Inectors inoperative VIN: 1G2HX53L33
The VATS module was installed and vehicle started right up. So much for all that was done was welding on the exhaust pipe. Thanks for everyone's help and responses. I even received a phone call from 'BILL FULTON'.Also a special thanks to my son Mark Frazer.
2001 Pontiac Sunfire SE 2.4L ses light on VIN: 1G2JD12T7Y
Thanks to all who responded. I put a AC Delco alternator in it and sure enough it did the trick. Thanks Again.
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