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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 13, 2007
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Open Help Requests for GM
Help Request Answers
1997 Buick Century Limited 3.1L Door locks, and PRNDL indicator VIN: 2G4WY52M8V
Hi everyone, I have this Buick that is a Used Car Lot's car. It has an issue that is quite strange. The problem is that when you shift the transmission, the indicator on the dash will show P in park, and D in drive, but will also show D in R, P in N, P in 3, D...
1980 Cadillac Seville 5.7L Poor Fuel Economy VIN: 6S698AE690
intermittently the battery runs down and the fuel pump stays running, i have no schematic or partas locator for this car i suspect the fuel pump relay and/or ecu, can anyone send some info on this very pristine classic??? thanx in advance for any help
1987 Chevrolet S10 Blazer Sport 2.8L basic brakes VIN: 1GNCT18RXH
i have run out of ideas. this vehicle has no antilock brakes just the basic front disc rear drum. the vehicle will stop under normal braking okay, the pedal pressure is a little high, but if your try to step futher into the pedal with more forse there is very ...
1989 Chevrolet Sprint 1.0L Cuts out VIN: JG1MT2162K
I'm trying to find a problem that only happens once a week to as often as three times a day. Customer says car simply quits, while driving or when idling at a light. It refuses to restart sometimes until the next day, sometimes it restarts right away. The only... Trouble codes: 13 (O2 sensor circuit open or shorted)
1994 Chevrolet Caprice Classic LS 4.3L No Start, Cuts out VIN: 1G1BN52W4R
car came in on hook. would start than stall and has not restarted since. checked wiring for module,distributor to ecm.ok. replaced distributor,cap and rotor. installed used ecm and had it programmed for vehicle. fuel pressure is within specs. ran out of ideas,... Trouble codes: P0016, P0036
1996 Chevrolet Cavalier 2.2L Surge, Cuts out VIN: 1G1JC5244T
this car has a bad surge it feels like it is starving for fuel.itried a new pump no change.it is alot worse with map unplugged.i almost seems like it cuts out on accel.thanks.
1998 Chevrolet Blazer 4.3L temp door actuator VIN: 1GNDT13W3W
replaced actuator because gear teeth were broken. new actuator still defaults to the hot side of the door. tried to reset by disconnecting radio fuse and battery. did not change anything. at 74 degrees can tell the vacuum part starts to work. thank you for you...
1999 Chevrolet Venture 3.4L MIL Lamp on VIN: E7XD326778
sorry all, not a drivability expert, basics may be overlooked this car came in for a p0327 knock sensor and a 24xckp sensor code originally i changed the 24x c/s sensor and now there is no 24x data where before there was some data, it would disappear after ab... Trouble codes: 327 (341 -), 341
2000 Chevrolet Camaro 3.8L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 2G1FP22K6Y
hi guys,have this camaro here that has code p1518a. have cked power& grounds at the tac module and there ok. the 5 volt ref.out of the tac module on pin 24 is like3.57 volts and at pin 11 its 3.97 volts . the car wont accel. at all. from what ive tested i thin... Trouble codes: P1518
2001 Chevrolet S10 4.3L MIL Lamp on VIN: 1GCCT19W61
Hi , this one is a little strange we checked the MAF code out and replaced the MAF sensor , we have a veh that runs great but keep kicking a MAF code ,checked conn. & grounds all ok , no plug wire interferance , but while watching the MAF sensor on the scanner... Trouble codes: P0101
2001 Chevrolet Impala 3.4L Radio & lighting VIN: 2G1WF52E61
Car came in repair request batt. drawn down over a couple days, car cranks slow, cust., has been disconnecting batt., so car has a lot of codes, we have 2 amps of draw if you pull radio hot all time fuse draw is cut in half. If you pull cluster/ BCM fuse draws...
1988 Oldsmobile Cutlass Calais 2.3L Cuts out VIN: 1G5DGH76J8
runs five minutes and stalls changed o2 and runs alot better,did this i owned one before and my car ran great,this one stalls after running little while.after a road test still will stall .when it does stumble then stall engine light flashes,checked codes,23 a... Trouble codes: 23 (air temp sensor open), 26 (qdm error), 43 (est failure), 53 (over voltage)
1995 Oldsmobile 88 Royale 3.8L battery VIN: 1G3HN52K2S
Hello, I have a vehicle here that has a intermittent battery draw. I am the third shop this vehicle has been too!!! The first shop replaced the battery and three days later replaced it again!!! The second shop installed the third battery and the next day repla...
1999 Pontiac Grand Prix SE 3.1L High idle VIN: 1G2WJ52M0X
Hi. I just installed a used engine in the vehicle. Now i get a high idle around 2000 rpm. Sometimes if i turn the key on and then back off before i start the car it will idle normally. Lately even that is not working. I swaped the iac and throttle body from th... Trouble codes: P0507
2002 Pontiac Firebird Formula 5.7L Clutch Hydraulics VIN: 2G2FV22G52
I had a customer with a 2002 Trans Am WS6. Vehicle has 90,XXX miles with a 6 speed tranny. Complaint/Cause: During extreme acceleration clutch pedal stays on the floor. Pedal will stay that way for a couple minutes until pedal is pulled up with feet. In norma...

Fixes & Summaries for GM
Fix/Summary Answers
1987 Chevrolet Nova 1.6L No Start VIN: 1Y1SK5148H
Went to pin out ECM and found that the heater core had leaked all over it. No shorts in wiring. ECM full of coolant. Install used ECM and all is ok. Customer did not want to fix heater core. ECM wiring harness was long enough to put it into the glove box.
1995 Chevrolet P30 Van 5.7L Poor Idle Quality, Surge, Cuts out, Stall VIN: 1GDHP32KXS
Thank you for all the replies. It seems to me the simple ones always are the ones that stump you. After running another fuel pressure test , pressure was at 10 psi. pinched return line and pressure did not increase. R&R fuel pump and replaced 14 psi at idle an...
1995 Chevrolet Lumina LS 3.4L timing belt VIN: 2G1WN52X1S
First off, thanks to everyone ensuring us we needed to do the proper timing procedure before going any further it runs like a champ now and all six holes contribute equally. borrowed gm tools from some friends at a local dealership thnks to guys like that too!
2002 Chevrolet Cavalier 2.2L all gauges VIN: 1G1JC52462
hi all well i finaly fixed this car started by disconnecting the bcm and cluster and reconnecting all was fine for about 3 days then it started again so i got a new bcm in it and now on its 5 day all is good thanks to all for your replies
2003 Chevrolet Silverado 2500 HD 6.0L Turn signal and hazard VIN: 1GCHK29UX4
Thanks for the replies. This one turned out to be a bad in cab fuse block. We found by pushing very hard in and forward on the flasher the lights would work. Tried twisting the tabs on flasher for better connection but did not help. Replaced the in cab fuse bl...
2002 GMC Envoy SLE 4.2L Alternator VIN: 1GKDT13S22
Thanks for help from those whom replied! When checking for voltage at the alternator turn on wire I was back probing connector for voltage. After reading flow chart and reading help responces, I realized the connector needed to be disconnected. When key was cy...
2000 Oldsmobile Alero GL 3.4L no start VIN: 1G3NF12E51
As most of you said, the ignition switch was bad. It has a sensor in the outer housing that detects lock position for anti theft measures. If someone tries to put a pair of channel locks on the ignition switch, it will not start. I replaced the inner and outer...
1986 Pontiac Fiero GT 2.8L alternator VIN: 1G2PG9793G
Thanks to Carl from California, Wade from Colorado and many others who sent me down the proper road. Carl hit the nail on the head. I am not the person who put this car back together, but I am the one who has to figure out why it's not right. The kid who put t...
2002 Pontiac Aztek 3.4L Passlock/BCM VIN: 3G7DA03E42
Thanks to everyone who responded, especially David [...]. We found the ignition switch was operating fine according to the BCM. It recognized the switch in all 3 positions, but stopped sending power to ECM in various positions. The switch also left some volt...
2002 Saturn Vue 2.2L ac operation VIN: 5GZCZ23D92
First of all, I would like to thank all of the techs who responded to this posting. After we recieved the 2nd control head from Saturn and installed it into the vehicle everything works like a charm. Thanks again for all the insight you gave and I hope I can b...
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