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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 24, 2006
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1996 Buick Skylark Custom 3.1L No Start, Stall VIN: 1G4NJ52M3T
Car came in, crank,run,stall. Fuel pressure checks out @ 43psi KOER. Engine stalls after 2 seconds run time. Codes p1573 & P1629 were history codes. Cleared codes, (checked to be sure they cleared), crank engine. Same thing start run & die. Code 1629 returned ... Trouble codes: P1573 (ebtcm/pcm serial data ckt), 1629 (theft deterrant system cranking signal malfunction)
1999 Buick Regal GS 3.8L Stall VIN: 2G4WF5212X
This Buick has a strange concern . It will intermitantly die on the customer Ive only got it to act up one time . What I can tell you is there are not any codes, data is normal,fuel pressure good. when it does stall (Ive only experienced 1 time) it is just dri...
1992 Cadillac Eldorado 4.9L ride control VIN: 54SDF64G6E
we talked to cadi service manger he said system was updated but wont give any info and customer cant afford to take it to them (older retired couple)i really want to help but never delt with this system thank you for any help
1999 Cadillac Seville STS 4.6L Keyless Entry VIN: 1G6KY5495X
Need to know if there is a way program the keyless entry manualy, for a 99 Cadillac STS.
1985 Chevrolet Corvette 5.7L Hesitation, MIL Lamp on VIN: 1G1YY0783F
first i would like to thank all who take the time to reply. i know by looking at related history, you're all going to say good luck. but actually i'm almost there. got it running and now the only thing left is this code 33 for the maf sensor. my local gm conta... Trouble codes: 33 (maf sensor signal voltage high)
1993 Chevrolet Lumina APV 3.1L No Start VIN: 1GNDU06D3R
Hey all, got a headache here. Van looses spark and injector pulse after 10-15 minutes of running. Then has to sit for 4-5 hours before it will restart. fuel press stays good. Voltage at coil and at module are good. Powers and grnds to ecm are good. We started ...
1997 Chevrolet C1500 Cheyenne 4.3L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GCEC19W8V
hello !!! thanks to everyone in advance. have read several of the fix data base. lots of ideas. changed the cam sensor and cleaned the maf sensor cleared the codes mil lamp comes on instantly. please help Trouble codes: P0102, P0340
1999 Chevrolet Lumina 3.1L Hesitation, Cuts out, Misfire VIN: 2G1WL52M4X
after 5to 10 miles ,no power like cat. clogged,then starts to buck and stall.crank n cam in sync.no codes no missfires, egr not opening at time to stall
2000 Chevrolet Suburban 1500 LT 5.3L MIL Lamp on VIN: 3GNEC16T2Y
(p1415) we tested the air injection system and all components check out ok. we commanded the air pump to turn on with a scan tool and air is present at outlet of the air shut off valve. the monitor looks for two things when setting a dtc, (1) the ho2s voltage ... Trouble codes: P1415 (Secondary Air Injection System Bank 1), P1518 (Throttle Actuator Control Module)
2001 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52J11
Thanks in advance for any help. Customer brought car in for check engine light and a intermittent high idle. Had a dtc p1635, 5 volt ref. circuit and p1189, engine oil pressure switch. Started by checking p1635 first. Checked 5 volt circuit for tps, map, egr p... Trouble codes: P1189 (engine oil pressure switch circuit), P1635 (5 volt reference 1 circuit)
2001 Chevrolet Silverado 2500 HD 6.6L Lighting VIN: 1GCHK29171
Howdy, This my step dads truck and the question is this, he pulls a fifthwheel and a smaller trailer and uses a seven pin rv plug for both. Neither trailers brake lamps work, the turn signals and tail lamps do just no brake lamps. I looked at the wiring diagra...
1997 Geo Tracker 1.6L Hesitation VIN: 2CNBE1869V
Customer drove vehicle in 3 weeks ago, Absolutley no power. Replaced Plugs & raised timing as idle vaccum was 10 in., Ran like a top. Back now with idle vaccum at 15.8 in., was 20 in. when it left. Accelerates OK till about half throttle, & then Has little res...
1999 GMC Sierra 1500 SL 5.3L heat controls VIN: 2GTEK19T3X
Hey all, This one has come to me from another shop. The problem withthis system is when you turn the temperature controls to hot it actuallly sends cold and vice versa.The control panel has been replaced as well as the temperature door motor. I have examined ...
1999 Pontiac Grand Am GT 3.4L slow initial start VIN: 1G2NW52E9X
Hi, techs I'm having a tough time with this one. This car has an extended cranking time on initial start up. probably cranks over for 3 seconds before firing. After it is started once it will fire right off. If you shut it off and restart within 5 min. it will...
2000 Pontiac Firebird Formula 5.7L ride height VIN: 2G2FV22G2Y
vehicle is equipped with ws6 suspension option. vehicle is in alignment and tracks fine driving. no tire wear is showing and as stated in testing no mechanical problem with track or stabilizer bar. the springs were replaced with new just to eliminate them as p...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick LeSabre Limited 3.8L reverse engagement cold VIN: 1G4HR54K2Y
Well this vehicle is in the done file. After posting a help request on iATN and consulting a friend in the trans repair business we decided to replace the 'pressure control solenoid' and the'fluid pressure manual valve position switch assembly'. The part numbe...
1990 Chevrolet K2500 Cheyenne 5.7L steering pump VIN: 2GC6K29K5L
A used P/S pump fixes this vehical both reman pumps were apparantly defective
1993 Chevrolet K2500 Cheyenne 7.4L Misfire, BACKFIRES VIN: 1GBGK29N6P
Sorry I can't post a fix, but the dealer I was fixing this for pulled the plug after I told him I probably could make it run reasonably well as is. Thanks for the MANY replies. I did replace the dist shaft and pick-up as was strongly urged by several techs but...
1997 Chevrolet C1500 Cheyenne 5.7L pinging VIN: 2GCEC19R6V
hi guys,tanks to all for your replys,it seems that the quality of gas was the problem,i think i mislead you all as i did not do the intake job and after talking to the customer for the 5th or 6th time found out they had re placed 3 lifters at the same time,as ...
1999 Chevrolet Monte Carlo LS 3.1L surge VIN: 2G1WW12M6X
well guys didn't know i could only update once, until i tried. this vehicle was also sent to the chevy dealership twice and for over 1 week and they could not fiqure it out correctly. turns out tcc slippage that was not enough to set code but enough to cause t...
2001 Chevrolet Monte Carlo SS 3.8L No Start, Stall VIN: 2G1WX15K21
Hello everyone. Thanks for all the replies but especially to Justin Belaire. Although there were many suggestions to replace the fuel pump, I was not convinced the pump was the culprit. After removing the fuel pump relay box, with scan tool and fuel pressure m...
2002 Chevrolet Blazer LS 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNCT18W72
This blazer doesnt have a egr valve.There was a reply to check the egr valve.Did a injector balance test and found cylinders 3 and 5 drop was about 3 pounds less then the others.Cleaned the injectors twice and blazers is fixed. Trouble codes: P0131, P0171, P0300.
2004 Chevrolet Aveo 1.6L enige oiling VIN: KL1TD52684
Greetings. This one is fixed, hopefully with no lingering problems. Thanks to Alfred from Florida, Paul from Wiscnsin and Bob from Cayman Islands for their replys. They all agreed tha it sounded like lack of maintainance. When I talked to the customer I found ...
2004 Chevrolet Tahoe LS 5.3L Tire Pressure Sensors VIN: 1GNEK13Z14
Thanks to all that took the time to help. The customer decided he wanted to live with the light verus spending the cash on stems. I did however find out that we could have drilled more holes in the spare rim and installed four more stems into it to fool the sy...
1993 Geo Tracker 1.6L No Start VIN: 2CNBE18UOP
well it was a combination of ecm and distributor. the ecm fixed the groung to click relays in. the distributor fixed the spark problem. i guess im just lucky to get one with both problems. sorry cant give more details as to fix but all who answered my help req...
1999 Oldsmobile Intrigue GL 3.8L ac control head/drl lights VIN: 1G3WS52K4X
Thanks for all help seem that voltage volt problem are common on these cars.perform voltage drop test at the ign sw and at fuse panel all were ok.then i trace back to slice under glove box and that volage was ok about 2 inchs down further is a splice that has ...
1998 Pontiac Trans Sport Montana 3.4L power sliding door VIN: 1GMDX03E5W
thanks, a few of you told me about the recall. Dealer took care of the whole thing at no charge. That was easy. I tryed to re-initialize it but that did not work.
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