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Prev Professional Automotive Repair Technical Discussions for September 15, 2008
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Open Help Requests for GM
Help Request Answers
1998 Buick LeSabre Custom 3.8L No Start, Misfire VIN: 1G4HP52K8W
IATN Strikes again! Vehicle came as no start no run.Good spark.,Good fuel Pressure.;Had Code PO300.Pulled plugs all fouled.Replaced Plugs & Wires vehicle started with large cloud of smoke.I'm thinking that plugs were gas fouled cyl. loaded with fuel.Took car f... Trouble codes: P0300
2000 Buick LeSabre Limited 3.8L MIL Lamp on, AC COMP SHUTS OFF VIN: 1G4HR54KXY
after running for a couple of minutes, the abs, mil, security, traction control lites all illuminate. when they all come on, the compressor shuts off and fuel guage drops to empty. clear codes, all works fine for two-three minutes then starts again. only codes... Trouble codes: P1602 (loss of abs serial data), P1626 (anti theft system fuel enable)
2007 Buick Allure CX 3.8L handling VIN: 2G4WF58251
Hi guys and gals. I have a 2007 Buck Allure that has a "shimmy", not in the wheel but in the entire can feel it through the floor pan up through the highways speeds. I have tried changing the tires, wheels, and did a 4 wheel alignment. ...
1999 Cadillac Seville SLS 4.6L windows, radio, cluster VIN: 1G6KS54Y6X
ign. switch in on position windows and radio work fine. start car and windows,radio cut off, airbag, traction, security light stay on. Cut off and restart battery light comes on and security, traction stay off.
1999 Cadillac Seville SLS 4.6L seats VIN: 1G6KY5494Y
hey everyone i have a 99 seville with heated seats the fuse was blown replaced now lites lite up on all four of the switches but none of the seats will heat up i havent worked on any of these just wanted to know were i should start looking do these have module...
1995 Chevrolet G20 Chevy Van 5.7L Excessive Emissions, Stall VIN: 1GBEG25K1S
This van will run good for a while, then right injector will loose pulse signal from ECM. Then at random left injector will stick open and remain open after engine stalls.We replaced ECM but we had the same problem. I traced wires from ECM to injectors,inspect...
1997 Chevrolet K1500 4.3L Poor Idle Quality VIN: 1GCEK14WXV
this truck came in the shop that while going on the highway this truck hesitates.the customer complained that the problem looks fuel related.i hooked up the scanner and and got p0300,egr code,and short or open for sending unit signal.when you look at the misfi... Trouble codes: P0300
1998 Chevrolet C1500 Cheyenne 4.3L No Start, Cuts out VIN: 1GCEC14W5W
This vehicle intermitently starts, when running cuts out shortly after starting. Check fuel system, ignition, and charging circuit all check out fine.
2000 Chevrolet Tahoe LT 5.3L Cruise Control VIN: 1GNEK13T2Y
Truck came in with inop cruise control. Checked all fuses and all are ok. Truck has no VCM signal at cruise control module or at vehicle control module. Cruise control module has all other inputs: (CRUISE ON INPUT):Yes Battery Voltage (SET/COAST SIG):Yes Batte...
2001 Chevrolet Impala 3.8L ignition switch VIN: 2G1WF55K51
hey guys thanks in advance this is probaly a simple but has me going bald. vehicle came in for no turn signals replaced flasher 4way combo in dash put everthing back together dash just pops in couple of screws simple untill i try to start vehicle and key wont ...
2002 Chevrolet Express 3500 6.5L speedometer VIN: 1GDJG31F12
i have a 2002 chev express 3500 w/ 6.5 litre diesel engine. my problem is that code p0722 output speed sensor low voltage , which causes eratic speedo and shifting. i scoped vss signal at buffer and had a clean 2 volt a/c signal. when i scoped vss input to pcm...
2002 Chevrolet Trailblazer LS 4.2L Accessories VIN: 1GNDT13SX2
This vehicle came in with the complaint that the battery is draining over night. I began with a draw test and found the vehicle is pulling 2.44 amps key off and removed, all doors, lights etc. off. After removing all fuses and circuit breakers I found four cir...
2005 Chevrolet Silverado 1500 5.3L dash lites VIN: 1GCEK19B95
this is my own vech.used only on week ends.while driving to n.h. this week end i lost my dash lites,radio display and a/c display.the next morning they worked o/ happened twice more over the weekend.i checked fuses,poor connections,ect. no codes in bcm.aft...
1996 Oldsmobile Cutlass Ciera 3.1L Poor Idle Quality, Poor Fuel Economy, MIL Lamp on VIN: 1G3AJ55M5T
help!!! wehave 96 olds ciera with lean fuel trims and idle hunts up and down. yes the miles are right not 100,000car recently bought from old couple that never drove it.little known about history of car.we have hit a brick wall on this one.would appreciate any... Trouble codes: P0171, P0131
1994 Pontiac Grand Prix SE 3.4L abs VIN: 2G2WP522X4
Road tested and inspected brake system. No brake pulse, no chatter. Tires equal and pressures good. History code of C0245. Cleared code and customer drove vehicle for 2 weeks before light reoccurred. Verified harness routing. check all connectors for moisture....

Fixes & Summaries for GM
Fix/Summary Answers
1978 Cadillac Seville 5.7L No Start VIN: 6S69B8Q505
I apologize for taking so long to get up here with a fix, but it's not fixed yet. I'm waiting for an OK to replace the PCM. The ECT and air temp sensors both read correctly, both resistance and voltage. However, when I disconnect the ECT, nothing happens. It ...
1994 Cadillac Seville STS 4.6L Hesitation, Cuts out, Stall VIN: 1G6KY5295R
Thank's to all, Jaun @ MARCIAS Cadillac nailed it. It was the ECM. Thank's G.T. Trouble codes: P0073.
1991 Chevrolet Camaro RS 3.1L No Start, Stall VIN: 1G1FP23T8M
thanks for all the help from everyone .it did turn out to be three injectors ohmed out at 2 at 007 and one at 010.what i found to be wrong was i ohmed out each bank from the connector behind the ac and they both read 005. i decided to remove the intake and che...
1995 Chevrolet G30 Chevy Van 5.7L Poor Idle Quality, Stall, no power VIN: 1GCGG35K2S
Thank's to all, We tried a dist. the did not change anything. We chk'd fuel press. and it was below min., so we dropped the tank to find a pin hole in the connecter hose. We changed the pump and hose and all is well. Thank's G.T.
2000 Chevrolet Blazer LS 4.3L cluster VIN: 1GNDT13W9Y
Thank you Brion [...],you were right,there was a hair line crack on the one side of the circuit board.I had ask the customer if this problem ever accured when he hit a bump.He wasn't sure,so I went on to believe that it probably did,and that with the e-mail I...
2000 Chevrolet Silverado 1500 5.3L No Start, MIL Lamp on VIN: 1GTEK14T1Y
Well after 3 days on this thing I finally found it. What a ordeal. 6 replies to this one. 1. Asked if ignition switch was OEM (yes it was) and to recheck the terminals for spreading and poor connections Good idea but OK. 2. John from wash had a similiar proble... Trouble codes: P0463, P0758, U1026, U1041.
2002 Chevrolet Trailblazer LS 4.2L Stall, MIL Lamp on VIN: 1GNDS13S92
Sorry its been so long but this guy goes to school, or parties, (same thing) out of town. Have not heard anything negative so I think changing the oil may have helped with what I think is a sticking cam phaser. I'll repost if anything changes. Thanky, Thanky, ... Trouble codes: P0340, P0335, P0336, P0174.
2002 Chevrolet Impala LS 3.8L ABS Module VIN: 2G1WH55KX2
Thank you for all the replies. After I posted this request, I swapped the pins for the front speed sensors at the abs module and verified the faulty harness. I then had a LH wheel speed code. I Removed the cover on the harness and found about 4" back from conn...
1989 Pontiac Firebird Trans Am 5.7L Poor Idle Quality, Hesitation, Stall VIN: 1G2FW2182K
I haven't been able to fix this one yet. It's on the back burner until I get some more free time. I did check injectors, cat, and was able to swap tps and iac from a known good car. I checked grounds and they were clean and tight. I did contact the last owner,...
2004 Pontiac Aztek 3.4L Loss of power VIN: 3G7DB03E74
First I'd like to thank the group of respondents for their help and suggestions. IATN is a wonderful resource and all contributions are appreciated. The problem with this vehicle was in an unexpected area. The ABS system was the culprit. Due to the fac...
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