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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 15, 2006
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Open Help Requests for GM
Help Request Answers
1989 Buick Electra Park Avenue 3.8L Accessories VIN: 1G4CW54C3K
Greetings, This Buick will drain the battery in a few days. Has a parasitic draw of about 35 MA. Remove circuit breaker # 24(Power seats,door locks) and draw goes to 15MA. Seats, locks etc. work fine. Has any one had any problems with the seat memory module o...
1995 Buick LeSabre Limited 3.8L Stall VIN: 1G4HR52L6S
Well I have a strange one here for you GM techs..Hope you can help me out.Vehicle was stopped at intersection when problem occured.No prior indication or problem was stated by customer.Limped vehicle into shop to diagnosis. Vehicle starts fine but when gas is ...
1998 Buick Century Custom 3.1L Surge, Cuts out, Misfire, MIL Lamp on VIN: 2G4WS52M8W
Hi everybody : Customer complaint vehicle surge and no power at speed over 80 kms.Quick check for code and found P0101 MAF signal fail,and P0300 random cylinder misfire. Look up scanner and found out there is no MAF reading on both idle and 2500 rpm,it just ... Trouble codes: P0101 (MAF sensor signal), P0300 (Random misfire)
2002 Buick Rendezvous CX 3.4L abs lite on VIN: 3G5DB03E82
Hello Members, This one has got me stumped.I'm getting a code c0051.RR speed sensor erratic.While watching wheel speed on master tech you can see mph dropping off and erratic.I scoped all four sensors at ebctm connector all looked good also checked sensor resi...
1991 Cadillac DeVille 4.9L Misfire VIN: 1G6CD53BXM
hey caddie guys i have one that i cant figure out it seems like its missing all the time and has no power what so ever on a test drive. there are no codes and i have replaced the egr. fuel pressure is good. just had the compressor replace and then this started...
2000 Cadillac DeVille 4.6L brake lights VIN: 1G6KD54Y3Y
I have this Deville the rear brake lights don't work. The high mount brake light works fine. All other lighting features work properly, Alldata and mitchell both have the wiring going from the brake light switch to the hazard / flasher module and then to the R...
2001 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y11
code p0386 keeps resetting takes about a month does not seem to have any drivability concerns or starting issues if the code would reset while we have the car it would help and the customer is not much help about when it comes on Trouble codes: P0386
2003 Cadillac CTS 3.2L No Start VIN: 1G6DM57N73
thanks in advance for your help,this caddy has had an intermittent crank no start we had the car a couple of days started every time. The customer took the car brought it back 2days later same problem, this time it would not start.Fuel pressure still at 55lbs ...
1992 Chevrolet K2500 Cheyenne 5.7L Cuts out VIN: 2GCFK29K1N
had a dash problem with tach and speedo going up and down no matter how fast you were going. now it has a problem with est timing unplugged est connector runs great at base timing when plugged in runs doggy and tach and speedo go wacko again i have already rep...
1999 Chevrolet Silverado 1500 5.3L No Start, Stall VIN: 1GCEK19T2X
Truck was towed in after it stalled in a quick food drive thru. No spark, no fuel pressure, just a good cranking speed. I found the ECM B fuse blown and replaced it. Started normally and ran perfectly even through extended test drives. I found no rubbed throug...
1999 Chevrolet Express 1500 4.3L lock up VIN: 1GCFG15W5X
First off when going into lock up at around 45mph. the trans. seems to go in & out of lock up almost like lightly tapping brake peddle can watch rpm change on scan tool but see no other commands to disengage lock up have only one code for o2 sensor.This is not...
2001 Chevrolet Silverado 1500 5.3L No Start VIN: 2GCEC19T61
this truck will intermittently turn over no start has only got it to do this one time the very frist time it was here it would not start i gave it some gas and it started up so i put a iac on it came back a week later tested more and found low fuel pressure an... Trouble codes: P1631
2002 Chevrolet Impala 3.4L HVAC and cruise VIN: 2G1WF55E02
Hello all, thanks for your time. On the first visit the customer stated that the blower fan and the cruise control would not function intermittently and the failures coincide with each other. Observed operation static and while driving without failure. Ultimat...
2000 GMC Safari SL 4.3L lighting VIN: 1GKDM19W0Y
Van came in with complaint of, no auto light opperation, PRNDL lighting turning off with brake application, no right signal opperation,and turn signal indicaters lighting when headlights turned on. We started by verifying grounds, checking bulbs for shorted fi...
2002 GMC Envoy SLE 4.2L Transfercase VIN: 1GKDT13SX2
Need Help From The Field Service 4Wheel Drive Lamp Is On and Code C0550 In TCCM \ PCM Has Code U1000
1998 Oldsmobile Regency 3.8L Stall, MIL Lamp on VIN: 1GC52K6W48
Customer sayes that vehicle stalls at times. Mostly on decel, or at low speeds. I have test driven this car many times with no problems. Tested fuel pump, it has a good lab scope pattern, and 51 PSI. Scanned for codes, has three codes stored P0327, P0332, and ... Trouble codes: P0327 (Knock sensor bank 1), P0332 (Knock sensor bank 2), P0336 (Crankshaft position sensor performance)
1988 Pontiac Grand Am LE 2.3L Hesitation, hard start cold rich VIN: 1G2NV54D8J
please help!! i have a 88 pont grand am with 2.3l the vehicle runs rich and will black smoke out the tailpipe in the morning for about one minute. i have checked ignition system and fuel system. pressure is 35psi and i have relieved fuel pressure over night an...
1993 Pontiac Grand Prix SE 3.1L front suspension VIN: 1G2WH5420T
Noise from front suspension when backing up/under acceleration is heard. When you listen from outside the car, the noise seems to be heard from passenger side. Inside the car, it seems to be coming from driver's side. Control arm bushings appear fine. Strut ca...

Fixes & Summaries for GM
Fix/Summary Answers
1988 Buick Century Limited 3.8L alternator VIN: 1G4AL5131J
FIXED, The harmonic balancer rubber had deteriorated allowing the outer mass to rotate until metal to metal contact was made producing the rattle. When the alternator was charging at an idle it caused just enough torque to rotate the outer mass to lightly cont...
1995 Cadillac Seville STS 4.6L Cuts out, Stall VIN: 1G6KY5299S
We replaced all 8 injectors with new and also installed a rebuilt Delco PCM. Customer has had car for one month and cutting out problem has not re-occurred. I received many helpful replies, which you can review on website. However one member, David Ramm sent m... Trouble codes: 36 (EGR valve pintle position out of range), 39 (TCC clutch engagement problem), 95 (Engine stalled), 119 (Fuel injector open or shorted), 56 (Transmission input speed sensor problem).
1972 Chevrolet chevelle 350CID tachometer VIN: ID67H2K527
I want to thank all that responded but have to say that the customer declined further service. Some of the replies were helpful and some were not. The most helpful were the ones that refered to a filter mounted on the firewall behind the distributor. I did fin...
1992 Chevrolet Lumina APV 3.1L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Misfire, Poor Fuel Economy
Thanks for everyone's help , after checking and exhausting all the simple posibilties , It came back to internal engine , found low compression in cycl 2 -- possile leaky valve, customer declined the work and I was happy to see that 330,000 mile car go to the ... Trouble codes: 43 (esc spark control).
1997 Chevrolet Astro 4.3L Pedal feel, brake response VIN: 1GNDM19W3V
I have done it all and it is fixed. I wish I had learned more, but here is what happened. #1 Replace hydro-booster with rebuilt. Now brake self-apply when turning the steering wheel. #2 Replace the gearbox with rebuilt. (Booster rebuilder says that MUST be the...
1998 Chevrolet S10 LS 2.2L MIL Lamp on VIN: 1GCCS1949W
Well I'm not sure if we fixed the problem, we changed the front o2 sensor and returned the vehicle to the cutomer while we gathered information. the MIl never came back on and the readiness monitors all reset. The customer returned a few days later and we were... Trouble codes: 1133 (insufficent switching sensor 1).
1998 Chevrolet Blazer 4.3L Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1GNDT13W5W
Hello group, thanks for all the great replies , i had already tried almost all but went over them again to be sure, one thing i couldnt do is check the cam off set as my genesis doesnt show it on this particular year and set up i have checked it on others but ... Trouble codes: P0300.
2002 Chevrolet Avalanche 1500 5.3L xfer case/4wd VIN: 3GNEK13T12
time is up and i must close this now. havnt got this one fixed yet. customer does not need vehicle and is letting us work on at our pace (when we have time) but it acts like there is something binding inside the transfer case. when shifting with a wrench it fe...
1997 GMC Jimmy SL 4.3L 4wd VIN: 1GKDT13W8V
thanks to all who replies, install another new module & that solved the problem, the first module we installed was defective, could not belive that, anyway its fixed now. Thanks again
1990 Pontiac Bonneville LE 3.8L MIL Lamp on VIN: 1G2HX54C6L
Wow. Great response. Thanks to all 17 of you. Everyone was right on, the magnet was broken on the cam sprocket. It was easily checked once cam sensor removed and engine turned and I did have 10 volts to the sensor. This job ate my entire Sunday... if I was on ... Trouble codes: 41 (cam sensor).
1995 Pontiac Bonneville SE 3.8L keyless entry VIN: 1G2HX52KXS
I wasn't able to fix this one,however,there should be a button at the end of 2 brown wires to hold down for programming or connect the brown wires together. Unfortunately mine didn't have that. Thanks anyway to those that tried to help.
1997 Saturn SL2 1.9L Starting VIN: 1G8ZK5270V
Customer wanted us to solder on ground wire to the the primary side of relay to get starter working again, they did not want to spend any money on this car. Found TSB after car was gone on the fuses and such, so I did not get to check that out. However, the re...
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