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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 30, 2011
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Open Help Requests for GM
Help Request Answers
1995 Buick LeSabre Custom 3.8L No Start, Stall, MIL Lamp on VIN: 1G4HP52L8S
Car came in on the hook. Customers complaint was cranks but wont start.Had P0341 and IC not switching codes prior to repair. Problem was intermitent. I started the car and drove it in the shop ran very poorly and eventually died under power brake conditions. N... Trouble codes: P0341 (Cam/crank error)
1999 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y3X
Vehicle has energized purge and vent solenoid at all times. Power supply checks fine. ECM supplying ground to both solenoids when key is on. Grounds go away when ECU connector containing wires to solenoids is disconnected. Sent to GM had new ECM installed and ... Trouble codes: P0440 (EVAP Leak)
2006 Cadillac SRX 3.6L No Start VIN: 1GYEE63746
Vehicle came in on a hook no start, no crank and cannot remove key from ignition. have disconnected splice packs to remove most of the 31 modules from the system, still have all three codes and will not crank. have disconnected the few remaining modules and no... Trouble codes: U1300 (Class 2 data link low), P0318 (Rough road sensor), P1629 (Theft deterent signal not received)
1995 Chevrolet K2500 Silverado 7.4L ABS Light VIN: 1GCGK29N5S
reading data with snap on scanner wheel sensor info all over the board.
1999 Chevrolet Tracker 1.6L Poor Idle Quality, Stall, Misfire, MIL Lamp on, Runs Rough VIN: 2CNBJ186XX
Engine runs rough, misfire feel, check engine light starts flashing almost immediately with code P0300- multiple cylinder misfire. Engine seems unable to burn fuel completely, because spark plugs gas foul and has a rich exhaust smell. Went 'round and 'round to... Trouble codes: P0300 (Multiple Cylinder Missfire)
2001 Chevrolet Malibu 3.1L Cluster not working VIN: 1G1ND52J31
Can not get the scaner to talk to the ecm the problem is the instrument cluster is not working wright the gas and temp is not working it started when he hit a bump and now all the lights come on in the cluster and go out some times
2005 Chevrolet Silverado 3500 6.6L Hesitation VIN: 1GBJC39245
This is going to be a long one. Just thanking ereryone ahead of time. A commercial customer had their 2005 Chevtolet C3500HD Cab & chassis dually with overloaded utility body towed to shop because driver heard a load bang and then smoke started pouring out the... Trouble codes: P0335 (Crankshaft position sensor circuit), P0336 (Crankshaft position sensor performance)
1997 GMC Savana 2500 5.7L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 1GTGG29R0V
Thanks to everyone for your input ahead of time! I have this 1997 GMC full size van that has me scratching my head. Customers complaint was that in the morning, he drove it to the job site and it was running fine a few hours later, he started it up and it was ... Trouble codes: P0151 (O2 sensor circuit low voltage bank 2 sensor 1)
2003 GMC Envoy XL SLE 4.2L Surge, Cuts out VIN: 1GKET16S83
This one has me stumped. Vehicle came in surging , previous tech diagnosed as fuel pump, replaced fuel pump with after market unit, same prob. replaced fuel pump second time, same problem. When accelerating with this vehicle , fuel pressure will steadily fall ...
2007 GMC Acadia SLT 3.6L Power steering VIN: 1GKEV23797
Hey fellas! This Acadia has little power steering assist at idle when it gets warmed-up. Works fine cold. I suspect the pump is weak. Has anyone run across this before? Fluid is clean and full. No codes. Any ideas? Thanks!
2006 Other GM Astra 1.9L Radio/Central locking VIN: WOLOAHL486
At times over several months the radio & central display intermittently will not turn off when ignition key is removed. When this occurs, central locking will not operate from key remote. Frequency of fault has increased over time. It seems there is a fault wi...
1996 Pontiac Grand Prix 3.1L No Start VIN: 1G2WJ12M8T
ok guys this one has me scracthing my head, car came in with a no start. tested fuel and fire, both are there and present. fuel pressure is at 45 psi, and i have fire out of all 6 spark plug wires. scanned car and found no trouble codes. Iev watched the cam, a...
2008 Pontiac Grand Prix GXP 5.3L abs
I have grand prix in the shop for abs &trac light I found the main wire harness to be not pluged in.so I plugged it in now the will not star & still no com with abs has eney one heard of this? ???
1998 Saturn SL2 1.9L Engine VIN: 1G8ZK527XW
I recently bought a 98 saturn SL2 with a spun bearing. I can get a good deal on a 1997 Twin cam. I can't find any information if the 97 engine will work in my 98. Has anyone dealt with this before and know if there is any difference between the two?

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Park Avenue Ultra 3.8L engine VIN: 1G4CU5215S
Thanks everyone for the help found pcm to be bad thanks.I checked all pcm powers and grounds they were all good so I replaced pcm
2004 Buick Rendezvous CX 3.4L Steering VIN: 3G5DA03E54
1976 Chevrolet K20 Custom Deluxe 6.6L pings VIN: CKU246Z131
found blown head gaskets on both sides of engine and gaskets had no steam holes in them. removed engine and rebuilt entire engine correctly!!
1992 Chevrolet K1500 WT 5.7L spedo VIN: 1GCEK14K4N
You guys were right the wires ohmed out but still didnt transmit a good enough signal new wires all is well!! Thank you
2001 Chevrolet Silverado 1500 LS 5.3L Brake Pedal VIN: 1GCEK19T01
thanks to all the replays terry i would of fired a tech if that was the case all calipers were installed right found after repeated autobleed the abs pump and reg bleed the system i got a great pedal thanks again
2001 Chevrolet Silverado 2500 LT 6.0L Locking front diff. VIN: 1GCHK24431
Thanks Ruben: You gave what I needed to diagnose the prolbem witch ended up a bad accuator motor thanks guys for all of your help 4x4 works fine I had found out today it has been a few years since accuator had been replaced the truck get a hard work out on the...
2001 Chevrolet Silverado 2500 HD 6.0L hydroboost, steering pump VIN: 1GCHK23U61
Customer has not had time t bring truck back in yet, but he has had some more input. When going down a hill and he brakes hard, then the pump will stop giving any assist for several hours or a few days. If he applies brakes slowly, then every thing works n...
2002 Chevrolet Silverado 1500 5.3L Transmission Case VIN: 1GCEK14V02
Jasper is Replacing the trans, and i will be putting it in. We will have to wait and see if this one fails. I will post again if it fails in a short amount of time.
1999 Pontiac Grand Am SE 3.4L Misfire, MIL Lamp on VIN: 1G2NE52E3X
thanks for all the info.we did not get this fixed, wish we could have but customer needed her car. we tried and tested all suggestions to no avail, to add a comment this engine does not have rocker studs just bolts. one member mentioned to run a compression te... Trouble codes: P0300.
2001 Saturn SL2 1.9L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire, Poor Fuel Economy
Basically what it came down to was igntion. After further testing we found that the igntion voltage was as low as 10.5 volts at times. The alternator was failing. Installed new alternator and runs like a rebuilt motor should, thanks to all that helped. No... Trouble codes: P0440.
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