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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 26, 2009
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Open Help Requests for GM
Help Request Answers
1992 Buick Regal Gran Sport 3.8L Cuts out, Stall VIN: 2G4WF54LXN
Hello all! Regular customer brought his car in complaining of stall. Restarts right away. On test drive with no pattern car will buck. Speedometer and tach drop to bottom then go to top simultaneously. Then guages will resume normal operation. Engine will surg... Trouble codes: 41 (CAM SENSOR I dont think its related.)
1996 Buick Skylark Custom 3.1L Cuts out VIN: 1GM4J52M2L
hi iatn techs,gat one for the buick tech.this car have a problem with the passlock system.found out that the pass system fails some times.when it works,all the ligths on the dash turns on.when it fails,no dash ligth turn on.the engine would crank start and tur...
2003 Cadillac DeVille 4.6L ebcm VIN: 1G6KD54Y03
car came in for inter. traction light. during road test it stalled and restarted.scanned sys. and found code p0335b for crank sensor a. system voltage was low from veh. sitting. battery was charged all codes were cleared and vehicle was driven on a good run. a...
1993 Chevrolet Corsica LT 3.1L Excessive Emissions, BURNS OUT CAT IN 5 M VIN: 1G1LT53T2P
thanks all for answering to this problem. for i have no idea. this vechile has burned out two cat.. takes 5 to 10 minutes for the cat to turn red hot .. again fuel pressure regulator was leaking lots of fuel. burnt out the first cat. reinstall second cat burnt...
1994 Chevrolet Camaro Z28 5.7L Code 81 2-3 solenoid circuit VIN: 2GIFP22P9R
Vehicle came in with code 81, 2-3 shift solenoid circuit. I checked all the wiring, internal trans wiring was rough so I replaced it and both shift solenoids. Code came back. I found that the PCM wasn't sending a signal to the 2-3 solenoid. Replaced the PCM. I...
1998 Chevrolet Cavalier 2.2L Cooling Systems VIN: 1G1JC524XW
cust came in requesting head gasket for external leak.Replaced headgasket,car came back 2 days later with no heat/Coolant found on top of bottle.replace thermostat and degas bottle/cap. Shipped Car,car came back 2 days later no heat,found bottom of radiator to...
1999 Chevrolet K1500 Suburban 5.7L Parasitic drain on battery VIN: 3GNFK16R5X
This is becoming a headache for me and of course this happens to be my personal vehicle. Original alternator failed 6/2007. Decided to upgrade from 105 to the 140 amp alternator. Installed AC/Delco reman unit, just had to change the regulator harness. It worke...
2000 Chevrolet K3500 7.4L transfercase 4470 VIN: 1GBJK34J0Y
For those that know the 4470 Transfer case with transfer case electro magnetic syncro sleeve. Problem is front driveshaft will not engage with transfer case when commanded. This is a manual floor shift transfer case with and logic timer relay. The logic relay ...
2001 Chevrolet Venture LS 3.4L front brakes VIN: 1GNDX03E61
this van came in on the hook was bought at auction had to do a head job on it after test drove and noticed a noisy wheel bearing and when brakes applied seems to have little pressure mashing pedal as hard as possible only makes van come to a slow long stop ped...
2004 Chevrolet Tahoe LS 4.8L Mechanical VIN: 1GNEC13V14
The vehicle owner noticed a noise in the engine that at first I could not hear. After about 3-4 weeks I can now hear it and as more time goes by it seems to be getting worse. I sounds like a light lifter noise that is audible more from the lifter valley area t...
1991 Oldsmobile 98 Regency Elite 3.8L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1G3CW53L7M
Car has code 41 stored . Found burnt wiring at cam sensor , replaced pig tail and sensor. Still have code 41 , Check cam sensor magnent and found it was broken and missing magnent . Replace cam sensor magnent and retest still have code 41 setting. No signal fr... Trouble codes: 41 (Cam sensor circuit)
1999 Oldsmobile Alero GL 2.4L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G3ML52T1X
we have replaced all four injectors and coil housing, we injector pulse with and the crk and cam sensors show correct data we have checked for pcm ground and found no problems there. is it possibe for the ign module to short or the pcm drivers to cross short. ... Trouble codes: P0200, P0300
1988 Pontiac Fiero Sport 2.8L MIL Lamp on, Hard start VIN: 1G2PE1194J
Hello everyone, I have a intresting one here. We have a history of replacing modules on this one that dates back a few years. We have replaced the ignition coil with a Excel high performance and replaced the distributor due to pickup magnet being cracked. The ... Trouble codes: 42 (est)
1999 Saturn SL2 1.9L Starting VIN: 1G8ZJ5277X
no start when cold scan tool indicates open loop status nd dumping fuel into cyls. intermittent crank signal.after excessive cranking will eventually start and restart every time after when warm. ohm out wires from sensor to ecm good, tried new oem ckp and ecm...
2000 Saturn SL2 1.9L MIL Lamp on VIN: 1G8ZK5270Y
We have tested everything known to test, have called identifix and ran through everything they recommended. After the last TSB repair we gave 4 good road tests. Customer says light came on before she got home after pick up. Trouble codes: P0442 (EVAP system leak small)
2007 Saturn Ion-2 2.2L MIL Lamp on VIN: 1G8AJ55F47
Hi Group, 2007 Saturn 4 cyl. 2.2l. got a code P2432. Air Injection System Pressure Sensor circuit low voltage. check electric air injection pump relay and fuse, ok, check electric valve and relay, OK,if the Baro/Map Sensor is used to monitor air injection pres... Trouble codes: P2432 (Secondary air injection system pressure sensor circuit low voltage)

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Park Avenue 3.8L convertor VIN: 1G4CW54K8Y
2005 Buick Rainier CXL 4.2L MIL Lamp on VIN: 5GADT13S45
Thank you for those who did response my Help Request. The secondary air by pass valve was not working properly. the bench test shows the valve was not open or close properly. Replaced the valve, test out good. Trouble codes: P0410.
1996 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W9T
thanks to all that took there time to offer help on this repair aim very thankful,this car is fix it was the grown wire from the tps gone back to the ecm,replace wire clear all cods drove the car look at the datastreme info volt was within tolerance close thro... Trouble codes: P0122.
2003 Chevrolet Trailblazer North Face 4.2L Poor Idle Quality VIN: 1GNDT13SX3
Hi guys some of you guys were right on.Did a bg induction clean and it fix it right up.Boy you learn someting every day in this line of work.Thanks everyone for your help.
2004 Chevrolet Silverado 2500 HD 6.6L Hesitation, MIL Lamp on VIN: 1GCHK292X4
Thank you to all that replied the fix for now was to repplace the fuel filter it didnt seem to change the pressures that much but kept the light off just goes to show dont for get to check the obvious thank you all agian this is tryley a great tool in my tool ... Trouble codes: P1093.
2005 Chevrolet Silverado 1500 5.3L starter/ generator VIN: 1GCEK19T25
Not much help on this one. Found one of the batteries was bad .
1999 GMC Safari SL 4.3L anti theft VIN: 1GKDM19WOX
Thank you every one Who responded a couple emailed back and seamed to offer help that referd to the vat system this is a pass system When I started to look at it first thing in the morning it started first crank and never missed a beat all day maybe 20 times T...
1995 Oldsmobile Cutlass Ciera 3.1L Starting VIN: 1G3AJ55MOS
Thanks all for the help turned out to be the relay, somewhere in its life the relay was left loose hanging down enough for salt water intrusion (also why it was hard to locate) replaced relay and connector and re hung it where its supposed to be..
1994 Pontiac Grand Am SE 2.3L No Start VIN: 1G2NE5538R
We took and replaced the coil cover and the backfiring quit. But still didn't start. So we then determined that the fuel pump was out and replaced it. Now it runs. And as for low temps on the datatstream we took and used a different scanner and temps are back...
1995 Pontiac Firebird Formula 5.7L low level coolant light VIN: 2G2FV32P8S
This sensor will only operate with DEX-COOL anti-freeze. The problem went away with DEX-COOL in the cooling system. Thank you for all your help.
1997 Pontiac Grand Prix GTP 3.8L Excessive Emissions, No Start VIN: 1G2WP1210V
Thanks for all the help out there. Ended up with 3 problems all togeather. None good PCM we had wasn't good. Air flow sensor turned out to be the biggest of problems. Also crank sensor was having issues. New MAF and cranks sensor and customer was up and runnin...
2004 Saturn Vue 2.2L Won't Shift Out of 1st VIN: 5GZCZ33D04
The car was sent to the dealer for warranty replacement of the transmission. Thanks for all the help from the chat room and the ones who replied.
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