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Prev Professional Automotive Repair Technical Discussions for November 11, 2009
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Open Help Requests for GM
Help Request Answers
1995 Buick Riviera 3.8L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1G4GD2219S
Hi Folks, This customer said this symptom just started a couple of days before he brought it in. Check engine light on, lack of power until full throttle, severe 2 second engine cut out. After replacing everything in the repair history and erasing the code the... Trouble codes: 260 (QDM 2 Fault), 341 (Camshaft Sensor Signal Erratic), 361 (EST not toggling)
1998 Cadillac DeVille 4.6L fuel gauge VIN: 1G6KD54Y8W
Hello fellow techs, We have a strange caddy problem. Customer had fuel pump replaced at another shop, we test drove car and it showed 16 gal fuel at first, then it went to empty. The fuel pump wiring looks ok. This car also has strange electrical issues, the c...
2003 Cadillac DeVille DTS 4.6L Suspension VIN: 1G6KF57953
hi to all i have a 03 cady dts with a vibration at 65 to 80 we have road forced bal all four wheels alianment good has anyone ran into vibration poblems with the dts thanks jeff
1988 Chevrolet Cavalier 2.0L No Start VIN: 1J1CC1113J
Hi, i have a 88 cav with a no start that is killing me. Fuel pressure is ok @ 15 psi, new pump was installed. The weird thing is the inj spray is very weak so we swapped an inj no change, but if u unplug the ect sensor it will start. It isnt getting enough fue...
1989 Chevrolet V1500 Suburban Silverado 5.7L MIL Lamp on VIN: 1GNEV16K4K
Ok here it is in short ladies and gentlemen,I have a 1989 chevy suburban,I have owned this vehicle for 3 years bought it with a bad transmission from auction.the vehicle sat up in my yard for 3 years until a neighbor needed a vehicle to has a gm crat... Trouble codes: 43 (esc problem), 44 (lean exhaust)
1990 Chevrolet C1500 Silverado 5.7L No Start VIN: 1GCDC14K6L
i have this truck which will not start due to inadequate injector pulse (ground signal from ecm) the ground pulse is there but very weak, power side is batt voltage any time key is on or cranking, i have swapped ecm and complete dist from a running truck to no...
1991 Chevrolet Camaro Z28 5.0L Cuts out VIN: 1G1FP23F6M
This vehicle came in a month ago for a no start condition. I asked for your help back then and correctly identified the problem as bad (shorted) fuel injectors. Replaced injectors and vehicle ran great for 3 weeks. Now it's back. It will start right up and r...
1996 Chevrolet K2500 Suburban 7.4L Power Door Lock VIN: 1GKGC26J2T
Hello All, I have a Suburban that is not looking like a easy one to diagnose. Here is what is happening: Driver's door lock switch will lock all doors and unlock driver's door only. Passenger door lock switch will lock all doors and unlock DRIVER'S door onl...
1997 Chevrolet C2500 5.7L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1GCGC29R2V
all wiring harrness been ckecked for any short unable to go further at this point any help would be most thankfull Trouble codes: P1345
2001 Chevrolet Silverado 2500 6.0L compressor VIN: 1GCHC29U01
about 14000 miles ago another shop installed compressor, acum and orifice. vehicle came in to us with compressor locked up. installed new a/c delco compressor, acum and orifice. flushed complete system. oil was black. after installing new parts. truck did not ...
2001 Chevrolet Impala LS 3.8L starting and instrument gauges VIN: 2G1WH55K41
Hey guys hope you can help me here. I have an 01 Impala here that came in for heater control (no change over from hot to cold) and blower motor only working on high. Replaced HVAC control unit and blower motor resistor. No change with same symptoms. Now heres ...
2003 Chevrolet Silverado 2500 HD 6.6L Tourque converter VIN: 1GCHK23173
Came in with a p0741 ocasionally a air heater circut code comes up but the p0741 is always there for TCC performance stuck off. At 97% applied the slip is 400-500 rpm. Added shudder stop took down to like 200rpm slip. Replaced tourque converter same problem. D...
2003 Chevrolet Avalanche 1500 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNEK13T13
Complaint is missing at idle, with check engine light on & flashing @ times. Scan tested with tech2 & seen #8 misfiring bad under 1200 rpm, & #7 about 1/2 misfires of #8. All other cylinders ok. Spark is excellant to cylinders(tried 2 diff plugs, coil, wires e... Trouble codes: P0300
2003 Chevrolet Silverado 1500 4.8L Unknown VIN: 1GCEK19V13
Good evening all This is my personal truck.When the transmission shifts it makes a zinging noise you can here inside the truck,it doesnt do it all the time or if you take of real fast.It just does it when your just taking off from a dead stop and driving moder...
1995 GMC K1500 Sierra SLE 5.7L Cuts out, Stall VIN: 2GTEK19K3S
Greetings, this is my first time on iATN and I desperately need some help/insight to the problem I am having with this GMC. As stated I replaced the map sensor after testting and finding the original one to be hovering at 4.0v . I also replaced the connector t...
1987 Oldsmobile 98 Regency Touring 3.8L Poor Idle Quality, Surge, Misfire VIN: 1G3CX5132H
This olds has what feels like an intermit. misfire at light loads 1500 to 2000 rpm mainly going up hills. VERY intermit. to the point I've only experienced the symtom 2 times in the past year. Had my vantage and scan tool recording while it acted up once with ...
2001 Oldsmobile Alero GL 3.4L Misfire, MIL Lamp on VIN: 1G3NL52E61
This car misfires after sitting for a while, but only on cyl #1 and only for 10-30 seconds or so then it smoothes right out. I have swapped plug and wire with others to see if the miss moves, but it does not. I removed upper intake and fuel rail, pressured up ... Trouble codes: P0300, P0442
1986 Pontiac Fiero SE 2.5L Rear Brakes VIN: 1G2PE37R7G
I'm pulling my hair out. This is a simple no ABS 4 disc system. If I pull up the e brake and then hit the brake pedal it stays high and solid. Take the e brake off and the pedal goes low yet still remains solid. I performed the TSB to take up additional play b...
2001 Pontiac Grand Am GT 3.4L pass key VIN: 1G2NW52E51
About every three to four months this car will crank no start. Security light flashing. If you perform key relearn proceedure. It will start and run and be ok for the few months.I have checked all connections and customer has only one key. Thanks in advance fo...
1997 Saturn SL1 1.9L MIL Lamp on VIN: 1G8ZK527XV
hello we have this sl-1 with a cmp code. does anyone know if the ignition module acts as the cam sensor? scan tool does not list this code in troubleshooter. thanks for any help Trouble codes: P0341
2005 Saturn Ion-1 2.2L chime VIN: 1G8AL52F95
hey guys need some help or direction on this saturn.the complaint for my brand new used car is that the chime does not operate properly.when the key is in the ignition the chime goes on. bcm data shows the key command changing when it is pulled in and out.ther...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Buick Century Custom 3.3L No Start, Cuts out, Stall VIN: 3G4AL54N6M
2004 Buick LeSabre Custom 3.8L courtesy lamps VIN: 1G4HP54K04
customer returned with vehicle. found splice locations and wiring pinout charts. the fix was from a short in the wiring harness along the drivers door, someone had done prior work to the wiring harness, unrelated, and messed up the coating on 3 wires. it appea...
1993 Chevrolet S10 Blazer 4.3L No Start, Poor Idle Quality, Surge, Cuts out, Stall VIN: 1GNDT13W6P
Thanks for all of the great suggestions. I had a lot of replies with different things people have found on these little monsters. It did end up being the CPI injector assembly.
1998 Chevrolet Tahoe 5.7L transfer case VIN: 3GNEK18RXW
Thank you all for the replies, recived 4. Jerry [...] sent info about a snap-ring breaking on output shaft of transfer case which seems like a posibility in this truck, customer just hasn't ok'd teardown or replacement. I will post a fix if and when truck is r...
2001 Chevrolet Tahoe 5.3L Collision Repair VIN: 4687980989
Thankyou gentelmen, i wish i had have asked before doing this job, it was a total nightmare. I had made the mistake of pulling the old one out first, and i haden't thought about the concequences and i had not thought of attatching a fish wire prior to removal,...
2003 Chevrolet Impala 3.8L Starting VIN: 2G1WH52K63
I would like to thank everyone that sent replies. Paul for Texas had a simular vehicle with the same problem, so I took his advice and replace the BCM again. So far so good. The client has not reported any problems. Most of the replies talked about the key tum...
2003 Chevrolet Tahoe LS 5.3L No Start, no start inter. VIN: 1GNEC13Z13
sorry for being so long to reply the taho is still at the dealer and runs every time its started; i had some decent replys aaron from alaska says he thinks i am chasing a ghost and he may be right i ohmed and checked connections on every coresponding circuit o... Trouble codes: P1626.
1999 Pontiac Firebird Trans Am 5.7L Misfire, MIL Lamp on VIN: 2G2FV22G8X
Thanks to all that helped. It appeared that white smoke is from overfueling, o2 voltage fixes rich inj time increases to 4 - 6 ms for no apparant reason then corrects after a while and runs well. suspected pcm problem . check connections and found corrosion at... Trouble codes: P0200, P0300.
2002 Saturn L300 3.0L No Start, Stall, MIL Lamp on VIN: 1G8JW54R22
Hi guys, thanks for the help. After reading all your posts we was able to get the car to stall and found the crank sensor had opened internally. It did this after letting the car run for about a hour and turning it off and let it hot soak for 20 min. We rep... Trouble codes: P0727 (Engine Speed Circuit No Signal), P1780 (MIL Request by TCM).
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