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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 21, 2008
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Open Help Requests for GM
Help Request Answers
1987 Buick Electra Park Avenue 3.8L No Start VIN: 1G4CW5137H
This car was towed in from another shop with a no start condition. The previous shop changed the timing chain, cam interruptor magnet, cam sensor, crank sensor, crank sensor pigtail, ignition module, coil pack assembly, and the Ecm. I've gone over the alldat...
1991 Buick Century Custom 3.3L No Start VIN: 3G4AH54N3M
Family problem: Car is out of town, belongs to son's girl friend. Car stalled while driving, has good spark from all three coils. No injector pulse. Has 45 lbs of fuel pressure. Has 12 volts to injectors. Had coil paks replaced a month ago. Car ran fine untill...
1995 Buick LeSabre Custom 3.8L volt lite on VIN: 1G4HP52L3S
checked electrical system. no battery voltage on "l" terminal when running. according to schematic comes from volt lite thru pcm to alternator. ready to replace pcm but never encountered this problem before. is there something i missing in my diagram ? thanks ...
2002 Buick Rendezvous CX 3.4L Radio VIN: 3G5DB03E92
I have this 2002 Buick here that everyonce in a while it will leave the radio on when you turn the key off. It will stay on but you can't control it at all. It will not go off unless you pull the 60 amp fuse under the hood. Anyone seen this before??
1974 Chevrolet Corvette 5.7L brake VIN: 1Z37J4S431
This came in to the shop with a brake pull to right. Owner has only owned it for 8 mos. and only has driven it 3 times. It pulls to right. We inspected the brake system and found the left caliper replaced, all new pads, new master cylinder and front brake hose...
1991 Chevrolet Corvette 5.7L Poor Fuel Economy VIN: 1G1YY3386M
Thanks in advance for help, car came in complaint of running too rich, scoped o-2 and found it was slow so I replaced it, map sensor showed just out of range so replaced it too,nothing has changed the co readings. scoped inj. pw, iat,cts, tps, all normal. inte...
1997 Chevrolet Tahoe LS 5.7L Misfire VIN: 1GNEC13RXV
Vehicle came in for running bad and misfire. Found pressure regulator leaking (of course) so we replaced injector and we found #4 spark plug fouled with oil to the point that you couldn't see the electrode. We replaced plugs, cap and rotor and now instead of h... Trouble codes: P0300, P0304
1997 Chevrolet Astro 4.3L Excessive Emissions, Poor Idle Quality, Surge, Cuts out, Stall, MIL Lamp on VIN: 1GNDM19W7V
i have posted this car before i still havent repaired it. the engine runs bad loads up stalls. all the pid data fluctuates with the bad running engine. tps map cts ait egr aly the pid changes even when the engine is just trying to iidle or if i accelerate. i ...
2000 Chevrolet Astro 4.3L No Start VIN: 1GCDM19W41
hi ihave this astro with no fuel to the cylinders it has 65p.s.i. pressure. the van came in w/no start condition, found no spark replaced cap&rotor got spark,still no start,replaced plugs,distributer,crank sensor. the strange part is it won't start even if i f...
2000 Chevrolet Cavalier 2.2L MIL Lamp on, runs fine VIN: JHMDRT45M6
hello everyone i have a mill lamp on , no codes no com, runs fine ,tugged on wire harnness to ecm that runs across below radiator,at this point i scanned for codes and none were found and light went out for three weeks ago and just came back on , what i suspec...
2000 Chevrolet Cavalier 2.2L No Start VIN: 45Y7313890
I am not a Chevy guy so I thought I would try you guys. I am a tech with extensive years on Fords. We have a 2000 Caviler in our shop (towed in) and it will not start. Cranks great, fuel pump is cycling and works fine, filter is new, I have spark at the plugs....
2000 Chevrolet S10 4.3L Cuts out
when you drive this truck cold it runs normal..when it comes up to temp truck it idle great, but when u accelerate it bogs down.like the fuel turns off..but fuel pressure is normal..the only thing i havent done is cut the front of the convertor lose and look i...
2003 Chevrolet Express 2500 6.0L power steering pump VIN: 1GCGG29U53
It appears to me that I am having a pump problem. I don,t have a pressure tester but I can clamp off the pressure hose and get very little to no response from the change in the pump soound.
2004 Chevrolet C6500 Kodiak C6C042 7.2L Hesitation, Surge, Cuts out, Stall, MIL Lamp on VIN: 1GBJ6C1C04
I NEED HELP FROM ANY CATERPILLAR TECH,OR GM TECH.This is what I have,I bought a 04 chevy rollback with a cat engine in it.I have had this truck for almost a year now and have had this problem to come and go several times.Well it started out that the yellow lik...
2004 Chevrolet Astro 4.3L serpentine belt VIN: 1GCDM19X64
hi and thanks ahead for any help this has me stump ; customer bought van used about month ago it came in day after he bought it with a belt noise we check and found serpentine belt cracked, tensioner and idler noisey, up and down bearing play in alternator so ...
1994 GMC C1500 Suburban 5.7L Hesitation, rich on start up VIN: 1GKEC164KR
Hello to all once again. We have this GMC Suburban in the shop that is driving us nuts. On cold or cool starts it runs real rich if you tips into the gas. Black smoke coming out of exaust. We have checked and swaped (at customers request he has two of them) ma...
2003 Oldsmobile Alero GX 2.2L Poor Idle Quality, Stall VIN: 1G3NK52F73
Car came in with a rough idle and a stumble when the a/c compressor kicks in causing the engine to stall at times. Also had a rich exhaust code set. Customer purchased this used car about 6 months ago and it ran great. She is a visiting nurse so she runs on ba...
1998 Pontiac Bonneville SE 3.8L Stall VIN: 1G2HX32K0W
This pontiac has a very intermittent stall problem which generally occurs on deceleration. Each time it occurs it sets a po102 code. Power and ground to the sensor and the 5 volt square wave were monitored in the shop on a lab scope with the engine running. Du... Trouble codes: P0102
1997 Saturn SC2 1.9L Shift VIN: 1G8ZH1273V
this car has blown off 2 carquest filter and one saturn filter. The first one was put on after a flush. the car came back complaining of hard shifting then blow off filter gasket. I got it in replaced filter and replace the valve body with new solenoids. reset...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick Regal LS 3.8L MIL Lamp on VIN: 2G4WB52KOX
After doing some driving with this vehicle I removed some catalyst from the convertor and the problem went away. So what we had was a partialy plugged convertor backing up the exhaust but not causing any other drivability problems.Weird. Put a new convertor on... Trouble codes: P1133.
1969 Chevrolet nova 305CID 202 camel back heads VIN: 1456723450
thanx for the help very, appreciated.everybody had good info.i dont know why i was thinking it would be different. iknow it would be different for aluminum.this is my moms car.thanks again
1992 Chevrolet C1500 Cheyenne 4.3L fuel guage VIN: 1GCDC14Z2N
1994 Chevrolet Astro 4.3L Electronic VIN: 1GBDM19Z4R
Thanks for your help. It is fixxed. First I'll explain that the drac stands for:Digital Ratio Adapter Controller. Another name for it is Vehicle Speed Buffer. First, I checked the fuses. They were good. Next, we raised the drive wheels off the groun...
1995 Chevrolet Astro 4.3L Poor Idle Quality, Surge, Cuts out, Stall VIN: 1DSHJCKVJH
hi there thanks to iatn and all its members for ther support it turned out that the distributor gear was warn causing eratic idling replaced the distributor its a fix
1999 Chevrolet Express 3500 5.7L Cuts out VIN: 1GCHG35R3X
Thanks for all the info have replaced the coil like so many said and fix this vehicle
2001 Chevrolet Prizm 1.8L detonation VIN: 1Y1SK52811
This car still pings too much.checked valve timing again,and advance solenoid. no problem found. chevrolet has been no help. the toyota dealer reflashed the ecm it may have helped a little.there is no egr system.the engine temps are ok and intake air temp sens...
2001 Chevrolet Venture LS 3.4L No Start VIN: 1GNDU03E61
most of replies were right on. it was a bad connection at the fuel pump connector at the body
2003 Chevrolet Cavalier 2.2L Unknown VIN: 1G1JC52F43
Well we have not fixed this one yet, but after getting customer to return for further inspection we received a post and a phone call informing us of the block having an actual casting problem and will seep oil. This appears to be the case here because there i...
2004 Chevrolet Impala 3.8L MIL Lamp on VIN: 2G1WF55K24
This problem was intermittent so I waited until code came back before i brought back in. I took Daniel's advice first and isolated the vent valve and pulled a vacuum with a mity vac, found no problem. Then I took Richard's advice and energized the vent soleno... Trouble codes: P0455 (Large Evap leak).
2006 Chevrolet HHR LT 2.4L MIL Lamp on VIN: 3GNDA23P36
Vehicle has not been back. I still have no idea what might becausing this one Trouble codes: P2135 (TP Sensor 1-2 Correlation).
2002 Oldsmobile Bravada 4.2L rear air ride VIN: 1GHDT13S22
I found small air leak on top of one of the air bags. thanks to all who helped!!
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