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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 20, 2005
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Open Help Requests for GM
Help Request Answers
1996 Buick Skylark Custom 3.1L gauges VIN: 1G4NJ52M0T
this car came in with gauges jumping to 0 and back up interm. it will do it on smooth roads or rough roads, doesn't seem to make a difference with temp. some times it will jump in the shop just sitting. i have talked to the gm dealer service department and the...
2002 Buick Century Custom 3.1L oil in antifreeze VIN: 2G4WS52J42
2006 Buick Lucerne 3.8L pulls
Hi I'm trying to help out a local dealer with 2 new vehicles. They are both Buick Lucerne with a 3800 engine. Both vehicles exhibit a tendency to pull, depending on the position of the passenger. If the passenger is in the front they will pull right and if p...
1990 Cadillac Eldorado 4.5L MIL Lamp on VIN: 1G6EL1337L
Weve got this old worn out Caddy with a strange problem. Came to us as a stall out after short drive. Found 2 bad plug wires, so replaced wire set. On second test drive still had dying problem. When it died it was like you turned the key off. Had code p041 in ... Trouble codes: P0041
1997 Cadillac Catera 3.0L MIL Lamp on VIN: W06VR52R4V
Good afternoon group. I have a friends 97 Catera that has an MIL on. The owner replaced both front oxygen sensors and i cleared the codes for him. The light came back on the same day with codes for both front o2 sensor heater circuits inoperative. This is the ... Trouble codes: P0155, P0135
1990 Chevrolet Lumina 3.1L No Start, Stall VIN: 2G1W54T1L1
after replacing o2 and temp sensor all readings good ran for 5 min then it died took readings and found o2 no response and coolant sensor back to -26 deg let it set and all readings come back to normal it will run for 5 min then same thing again tried the ecu ...
1993 Chevrolet S10 Blazer 4.3L No Start, Stall VIN: 1GNDT13ZP2
Engine stalls."THE INJECTORS ARE NOT PULSING" (both on open & closed loop).The fuel pump runs and has good fuel pressure. The ignition is putting out good spark. The computer is not setting any codes. The vehicle may run up to one hour without stalling.When th...
1996 Chevrolet K1500 5.7L dash lights VIN: 1GCEK19MOT
Customer came in with problem in dash lights (PK LPS) circuit keeps blowing fuse when headlights are on. I checked the vehicle out and it intermittenly blew the fuse when you would turn the headlamp switch to prk lights. The times it didn't blow a fuse I would...
1997 Chevrolet Tahoe LS 5.7L alternator VIN: 1GNEK13RXV
Hello all, This vehicle has had repeated alternator failures. The vehicle arrived with no alternator output. The alternator was replaced with a less than desirable aftermarket rebuild. After replacement the alternator output was 13.5 to 14.2 volts and 90 amps....
1997 Chevrolet Blazer 4.3L speedometer VIN: 1GNDT13W3V
customer bought blazer out of canada. he did not want km. instrument cluster in it. he bought a cluster on e-bay so i installed it and the speedometer did not work. he got another cluster from salvage yard and speedometer did not work either. i installed the o...
1998 Chevrolet K2500 Cheyenne 5.7L clunk VIN: 1GCGK24R2W
I have a 1998 K2500 that has a horrible clunk intermittently. It only does it once per drive cycle, and so far has only done on or near the 2-3 shift. Also the trans has to be cold. After a few starts from a stop, it sounds like a quick ratchet and a clunk you...
1999 Chevrolet K1500 Suburban 5.7L MIL Lamp on VIN: 1GNFK16R0X
I have a repeating code 442 failure. I have smoke tested the entire EVAP system and no smoke is detected. The Evap system will hold vacuum without the fuel tank hooked up. When the fuel tank is hooked up the vacuum leaks down. I have pulled the sending unit ou... Trouble codes: 442 (small leak detected)
1999 Chevrolet C3500 7.4L Cuts out VIN: 1GBKC34J8X
hi group this thing mainly when turning to the right on initial take off will cut out like you shut the key off, went through all power and grounds rechecking everything the tech did when he installed engine, checked ignition switch ok, not loosing power to pc...
1999 Chevrolet Tahoe 5.7L pump shaft VIN: 1GNLEK13R6
Truck came in 11/24/04 @ 128384 miles for no power steering check & replaced pump,first replacement pump made howling noise so we got a second pump this one snaped the shaft in first 5 minutes,got 3rd pump flushed system and everythig fine untill December of 0...
2000 Chevrolet Tracker 2.0L No Start VIN: 2CNBJ13C3Y
hello fellow techs, i am up to my chin in trackers. this one was towed in with a no start. we checked all the usuals, fuel, fire, timing and compression. all checked good. compression values were 130 psi on all cylinders. i believe this should be enough?! afte...
2001 Chevrolet Silverado 2500 6.0L oiling VIN: 1GCHK24U11
hello got a nether problem here checked oil pressure 60psi hot, engine has very little oil coming out of pushrods this thing is rattaling badly. looked at old head gaskets 2 the new ones there wasnt any difference. ordered all parts direct from g.m. also looke...
2004 Chevrolet Silverado 2500 HD 6.6L Surge VIN: 1GCHC23254
Surges after warm up, no codes, i have no info on this truck, just wondering if there is any common problem with this...happens at idle...intermitten problem...may happend not happen for 2 weeks and then happen for a month straight...
1996 GMC Jimmy SL 4.3L Unknown VIN: 1GKCS13W3T
Customer brought vehicle in for a noise when driving. Sounds like water swishing when making turns left to right or when accelerating from stop. Sounds to me like the a/c drain is clogged up or heater core is full causing noise. Anyone seen this before?
2002 GMC Sierra 1500 Denali 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GTFK69U32
personal vehicle..misfire only when cold start, below 25 degrees. goes away in 2 - 3 minutes of driving . feels like im only dropping 1 cylinder. took scanner and mastertech home on several occasions only to have truck start fine.will only log nonspecific cyl ... Trouble codes: P0300 (random misfire)
2001 Oldsmobile Alero GL 3.4L converter VIN: 1G3NL52EX1
Hi all. Ive got this Alero that has a problem with the torque converter. It engages fine, however under slight acceleration the converter clutch surges in and out. The scan tool reading of the rpms indicate about a 100 rpm surge. The pulse width seems to chang...
2001 Oldsmobile Alero GL 3.4L Hesitation, Surge VIN: 1G3NF1ZE41
The problem is completely intermittent an shows up only between 43-47 mph. the vehicle has to be warm and slow to accelerate through the affected range to even present itself. we've had it here for the same problem 3 times without it even reoccuring. finaly to...
2000 Pontiac Grand Am SE 2.4L passlock VIN: 1G2NF52T1Y
hi again. Ive got a 2000 Grand Am that came in on the hook two days ago that was towed because of a no start. When the driver got there it started and ran. It still does. Customer stated that it happened a couple of days before also, but when they went out lat...

Fixes & Summaries for GM
Fix/Summary Answers
1990 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP54C3L
I'm going to close this even thought I did not fix the car. I got a lot of useful suggestions that I passed on to the other shop. It's up to him to decide what to do. The biggest response was bad coils, the shop claims they replaced them and they did look new....
1999 Buick Regal LS 3.8L airbag VIN: 2G4WB52K5X
thanks to the response to my airbag code fixed the car by reburning the computer. alls good with the car now.
1993 Chevrolet Lumina Z34 3.4L not sure VIN: 2G1WP14X2P
Re-checked everything again,customer does not want to go any further.Scanner reading on engine temp. is normal and also normal when checked with the temp. gun.Thanks to everyone who replied,glad to see this one gone.
1995 Chevrolet Corvette 5.7L shocks VIN: 1G1YY23PXN
thanks to everyone, as joe stated strutmaster.com was the ticket, they have everything we needed to do the job and it was quite simple.
1997 Chevrolet Astro 4.3L Misfire VIN: 1GNEL19WSV
well sorry for taking so long to post this fix. We ended up putting in a fuel pump and that fixed it right up as many replys sugg. again iatn saves the day !!! Trouble codes: P0300.
1997 Chevrolet Tahoe LS 5.7L MIL Lamp on VIN: 1GNEK13R2V
After double checking distributor alignment it was noticed that a bracket on back of engine was bent or improperly installed during overhaul which prevented us from installing distributor correctly. It was 1 tooth off. Thanks to all who responded. Trouble codes: 1345 (crank cam sync problem).
1998 Chevrolet Blazer 4.3L Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNT13W4W2
Well it's been a month and all is well with this problem child. It appears the oil was leaking from the back of the intake where the last 'guy' missed two inches of sealer on rear valley lip. Oil was pouring into wire loom (which just happened to have split si... Trouble codes: P0171, P0131, P0300.
2000 Chevrolet Silverado 1500 4.8L keeps running VIN: 2GCEKI9V1Y
ended up fuse 23 in conveience center under hood was hot when key off which also drives fuel purge,fuel solenoid, sec fuel pump circuit,which feedback also activated headlamps. fix was water filled wiring harness under cab about even with rear of front seat, p...
2003 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52J13
sorry for so long to post.waited till was sure it would run.as i steted before i replaced the crank sensor again and it fixed the car.maybe just bad parts?? car also had 1 bent exhaust valve.why we dont know.NOT A VERY GOOD ANSWER BUT ALL WE HAVE RIGHT NOW.
2003 Chevrolet Trailblazer North Face 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNET16S83
Hello everyone this vehicle is fixed thanks to Tony [...] he sent a diagnostic chart just for the p1345 code and the third thing on the list is testing the cmp actuator as soon as i looked at it you could tell it was leaking oil out through the solenoid we te... Trouble codes: P1345 (crank and cam sensor sync).
2001 Pontiac Aztek 3.4L No Start VIN: 3G7DAO3E41
Thanks to all who took the time to reply.The problem was a corroded wire in the 16 pin connector at C103 DK GRN wire.I found it after I installed the PCM & still had the same problem.The harness is stretched very tight & was rubbing on the EBCM bracket. Thanks...
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