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Prev Professional Automotive Repair Technical Discussions for February 16, 2005
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Open Help Requests for GM
Help Request Answers
1994 Buick Park Avenue 3.8L tcc VIN: 1G4CW52L4R
Hi to all group members. I have a 95 Buick Park Ave that has a code PO740 TCC circuit problem that after 5 hrs. work I can't fix. I have done the normal ground and power checks, and run the flowchart in MOD several times and find nothing wrong. The problem is ...
2001 Buick Regal LS 3.8L MIL Lamp on VIN: 2G4WB55K21
Customer states SES light came on appox 2 weeks ago. Tested for codes - P1404 EGR 2 position error. No drivability problems. Test results: ECM closed voltage shows .37 on scanner (snap on modis). Info I have says this should reset to match closed voltage of EG... Trouble codes: P1404 (EGR Position error/EGR clsd perf.)
1993 Cadillac DeVille 4.9L Excessive Emissions, MIL Lamp on VIN: IG6CD53B1P
diag. tree unclear after unhooking tps, value on the on board system does not change stays at 24.5 tps hooked up or not, alleged known ecu put in and tps replaced prior, along with idle controller, any ideas please help Trouble codes: 26 (tps sensor)
1998 Cadillac DeVille 4.6L no-charge VIN: 1G6KD54Y9W
Hello all, first thanks for taking the time to read this post. We have in our shop a 98 deville that is having a charging system problem. We are not getting the full signal from the inst. cluster to the trigger on the alternator. We have surface voltage but as...
1996 Chevrolet K3500 7.4L ride control VIN: 1GCHK3356T
dear 4x4 tech i have a nightmare here cust have big pu 3500 1 ton the pu high very high tall about 6f tall cust state that he test 4x4 once it work lastmonth he took it for a trip with trailer about 7000lb he stuck on the softsand when he try to turn around wh...
1997 Chevrolet K1500 5.0L 2-3 shift VIN: 2GCEK19MOV
Hello,I Just installed gm rem. trany because of a no shift out of 2nd gear. I think new trany is bad but I need more insight.(I normaly do not do any trany work). New trany will shift fine 1st to 2nd fells like neutral in third if vehicle speed is fast enough ...
1998 Chevrolet Tracker 1.6L timing VIN: 2CNBJ136XW
what a pain this one is,vehicle came in two weeks ago and ran poorly sounded like a jumped timing belt so we tore it down and all markes lined up -so we still replaced timing belt and after it would not start,so to make a long story short i ended up puting the...
1998 Chevrolet Malibu 2.4L Misfire VIN: 1G1ND52T9W
Just Helping a shop that is down the road, they have a chevy malibu 2.4L that is skipping. # 1 cylinder is not getting fuel,no injector pulse, noid light does not flash. Injector has power, checked ground circuit back to pcm OK. Found a used pcm with the same ...
2000 Chevrolet Silverado 2500 6.0L Electronic VIN: 1GCGK29U2Y
I was just wondering were there common problems with this code--B2725(ACTIVE TRANSFER CASE MODE SWITCH MALFUNCTION). The 4WD light sometimes comes on but most of the time it remains off. The switch works ok. He never experiences any problems. The dealer tells ...
2000 Chevrolet Venture 3.4L MIL Lamp on VIN: 1GNDX03E7Y
good evening techs, i hope somebody can help me with this chevy. the customer came to the shop with the check engine light on. there are no driveability problems.i scanned for codes and got a p1404 (egr closed position performance). using the scanner, i was a... Trouble codes: P1404
2000 Chevrolet S10 2.2L Cuts out VIN: 1GCCS1445Y
this is my driver,owned it about 1 year,it used to backfire while cranking and lightly flood(very intermittently)no codes were set,i replaced the "splitfires"with new plat. tip plugs and borg warner wires about 1 month ago,hasent backfired yet,the problem is i...
2001 Chevrolet Silverado 1500 5.3L abs sterts to apply around 10mi VIN: 2GCEK19T51
ran test with master tect scanner all tests ok,right wheel sensor ohms low replaced sensor,pedal to strart with wood apply abs every fourth time now applies every time,tsb said ck for rust etc,cleaned other sensors same problem
2002 Chevrolet Silverado 3500 6.6L Odometer, PRNDL,tow/haul VIN: 1GCJK33102
Fellow tech's: Here's a strange one! The odometer display, the PRNDL indicator, and the tow/haul light do not function. The trans shifts fine and the tow/haul function does work. The speedo works fine also. The customer states they all quit once before and the...
1997 GMC 6500 3116CC No Start VIN: 1GDJ6H19VJ
We are looking for truck tech help. We have a 3116 cat motor in this dump truck. Problem is it has to crank for 1 1/2 minutes before it will start cold.When it does start it runs rough for A few minutes then it is fine the rest of the day.I know its a fuel pro...
2000 GMC Savana 3500 6.5L Cuts out, Stall VIN: 1GBJG31F4Y
this truck will act like you shut the key off going down the road,one time it almost stalled coming up to a stop sign, the next time i was going up a hill and it just quit,recorded with scanner,don't see any thing,have pulled on wires,checked fuses,unable to f...
2000 GMC Yukon XL 1500 SLE 5.3L Temperature control VIN: 1GKFK1GT1Y
Hi, this vehicle has auto climate control in the front and the rear. Had gm dealer scan vehicle for codes (could not get our otc genysis to access atc system), codes present are b0414, b03531. Problem with this vehicle is you have to turn temperature select kn...
2003 GMC Sierra 2500 HD SLE 6.6L long crank time VIN: 1GTHK23113
first we are looking for a wiring diagram for this truck our fax number is [...] ok here is what is happening when you go out to start truck first time in morning its takes one to two minutes of crank time before it will start ! it seams like its losing...
1993 Pontiac Grand Am SE 3.3L Forward Clutch VIN: 1G2NE54N5P
Hello, Looking for some advice on this trans. This is a used car, very clean for the miles. Owner was complaining of a hesitation on acceleration. Verified hesitation on accel and misfire under load. Wet tested the ignition system and found #4 wire arcing out...
1997 Pontiac Bonneville SE 3.8L Mechanical VIN: 1GHX52K7T4
CAR DIED TURNING IN TO PARKING LOT. WAS HYDROLOCKED ,replaced upper intake plenum. Now just cranks, backfires in intake and tail pipe. Have good compresion,and spark. Could cam sensor cause a backfire? Or did the timing chain jump and if so how come we still h...
1998 Pontiac Grand Prix SE 3.1L Shifter & ingnition locks won't release by them s VIN: 1G2WJ52M5W
Both the park lock solenoid & steering column electric park lock don't unlock them selves. unless you do it manualy.
2000 Pontiac Grand Am GT 3.4L Misfire, MIL Lamp on VIN: 1G2NV52E1Y
This car was towed in with water in oil. Replaced intake gaskets and flushed engine.That problem is fixed. Now, when started cold, engine misfires on #3 and #4 for about 30 seconds. Sets code every time. Cant find any vacum leaks. Plug wires are new as are the... Trouble codes: P0300

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick Park Avenue 3.8L engine/vibration VIN: 1G4CV5211V
I replaced alll the engine monts and the problem was solved. the customer was satisfied that he had his quit buick back in running order. thanks for all the excellent information regarding repairs to the vehicle.
1997 Cadillac Eldorado 4.6L intake VIN: 1G6EL12Y4V
thanks for all the help on this one. special thanks to don [...],and david prokopt and many others. my problem turne...
1988 Chevrolet C1500 Cheyenne 5.7L loss of power
Rebuilt the TBI and motor purred like a kitten. had to be the fuel supply pressue. Thanks to all who posted Trouble codes: 44 (lean condition).
1993 Chevrolet Lumina APV 3.1L No Start, Cuts out, Stall VIN: 1GBDU06D4P
ok found ecm was shorting module in turn module was shorting out coil when ever you connected by-pass connector but sometimes module was not shorting only coil would that is what was throwing me off ! but never the less it was a shorted ECM that was causing th...
1993 Chevrolet S10 4.3L Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1GCCS19Z8P
thanks to all that have replied. one reply rcieved was very helpful with a web site that helped verify that this truck needed to be reprogrammed, since my local dealers stated that it did not need to be programmed, a second reply gave me a bul... Trouble codes: 55 (replace ecm).
1996 Chevrolet Cavalier 2.2L heater output VIN: 1G1JC124XT
I would like to thank every one for there suggestions. Currently the car has made two road trips with no problems. No coolant leaking no codes or driveabilty problems. Customer declines to open cooling system with it working ok at this time. I suspect as sugge...
1998 Chevrolet Express 3500 5.7L No Start VIN: 1GBJG31R5W
Thanks for all the responses. After going through all of sugestions, one of the other techs found that the singnal from the PCM, on the EST wire, was breaking down. There was no obvious sings of corrosion dammage, as was sugested, but replacing the PCM repaire...
1994 Geo Tracker 1.6L Timing Belt VIN: 2CNBJ18U7R
Well thank you all for the information that was provided. All advise was good. It helped us in leading us to the problem it had. After running the vehicle in the air withsome one in the vehicle, we found when the clutch was applied, the drive shaft would move ...
1990 Oldsmobile 98 Regency Brougham 3.8L No Start VIN: 1G3CW54C3L
A BIG Thanks to ALL that replied to this help request. Between the crank sensor and ign mod the problem has been resolved. We finally went below freezing last night, 0, and it started right up. Thanks Again to you all. You're FANTASTIC!
1994 Pontiac Firebird Formula 5.7L Hesitation, Surge, Cuts out, Stall, Poor Fuel Economy VIN: 2G2FV22P1R
As time is ticking away, I decided to close this post w/summary. I received lots of useful information, most of which I had already tried or have since to no avail. There are still a couple of things that need to be checked and given the opportunity I will, bu... Trouble codes: 15 (low coolant temp reading -40).
1994 Pontiac Grand Prix SE 3.1L tcc,4th code 80 trans component slippage VIN: 1G2WJ52M0R
Thank you for the replies. We have not had a chance to reschedule this car as our shop has been very busy. We will look at the vss and wiring harness as many have suggested. I will update when vehicle returns. Thank you again for taking the time to reply.
1995 Pontiac Firebird 3.4L tachometer VIN: 2G2FS22S8S
Thank you Techs. The student will change to the proper instrument cluster/tachometer as you requested (for V-6). AE
2000 Saturn LS1 2.2L engine VIN: 1G8JU52F2Y
Hi Gang, I absolutely detest having made a post for help then not being allowed to finish work on the car. As the ambient temperature warmed up in this locale, the noise from this engine stopped. I have always found it pretty hard to hear a noise that does n...
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