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Prev Professional Automotive Repair Technical Discussions for June 12, 2009
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Open Help Requests for GM
Help Request Answers
1998 Cadillac DeVille 4.6L No Start VIN: 1G6KD54Y1W
I have a vehicle that came in for an over heating problem. We checked it out and found that the head gaskets were blown on no.2. Normally, We would have replaced the head gaskets and time serted the block. The customer wanted a used engine with low miles. So, ...
1999 Cadillac Seville STS 4.6L temp door VIN: 1G6KY5490X
Hello Folks, this car has dual climate controls. The a/c blows very cold on the passenger side but wont get cold on the drivers side. I took the actuator off the heater box and physically slammed the temp door closed by hand but it still doesnt get cold on the...
2000 Cadillac Catera 3.0L MIL Lamp on VIN: WO6VR54R8Y
hello fellow techs i got one here that is kickin me in the butt i keep gettin this code p0411 secondary air fault here is the thing this car has the updated air hose i replaced the air check valve with the reed valves here is the kucker when the car is first s... Trouble codes: P0411 (secondary air fault)
1980 Chevrolet P30 Step-Van 5.7L Combo Brake Valve VIN: 1980CHEVP3
Hi to all brake techs, etc.. I'm looking to see if anyone has a source for a new or rebuilt brake combo valve. I've tried all my local sources and this valve is obsolete.
1987 Chevrolet G30 Sportvan 5.7L Poor Idle Quality, Stall VIN: 2GBHG31KXH
Starts and idles fine for a bit then it starts to idle at about 1000rmp rev it up the it let idle then it will die sometimes let it warm up it seems keep it running at idle at higher rpm runs fine. code 45 rich exhaust is thrown Trouble codes: 45 (rich exhaust)
1996 Chevrolet Monte Carlo LS 3.1L Unknown VIN: 2G1WW12M0T
Hi vehicle towed in with the radiator tank leaking,replace radiator and thermostat started filling with dexcool,and saw coolant leaking out of itake manifold.Tear it down and replaced intake gaskets(used the improved Fel-pro gasket set,the vehicle run ok when ...
2000 Chevrolet Silverado 1500 5.3L Stall VIN: 1GCEK14T6Y
Dear techs in IATN land. How is everyone today? I,m doing good myself, but not doing to good on this truck. This well maintained Silverado is having a problem with stalling on start up. 8 out of about 10 times it will start and stall, sometimes it will start a...
2001 Chevrolet Suburban 1500 5.3L ebcm VIN: 3GNEC16T71
This vehicle has returned with a code C0265 (EBCM Relay Circuit) in the history, Customer complains of ABS Light coming on every so often. While going thru the troubleshooting tree steps(ALL-DATA)it say's to replace EBCM. My question is is there any other way ...
1996 GMC K1500 Sierra SL 5.7L Misfire VIN: 2GTEK19R4T
misfire on #5 cylinder Trouble codes: P0300
1999 GMC C6500 7.4L Cuts out, Misfire VIN: 1GDJ7H1D8X
I have this GMC 6500 truck that is giving us BIG issues! First off this thing is Coil Near Plug.. Its is a 7.4L vin D. At first it would run bad all the time.. backfiring and missing like crazy! It then stalled and would not restart. When looking at it found t... Trouble codes: P0336 (CMP Performance)
1999 GMC Sonoma SL 2.2L Mechanical VIN: 1GTCS1446X
Hello all. Hopefully this may be a simple common problem. I have seen these codes before on some earlier tahoes and suburbans and have just sent to trans shop and never heard what fixed them. Customer states that after driving for a long time will not go into ...
2001 GMC Sierra 2500 HD SL 8.1L Crank Sensor VIN: 1GTHK24G61
Hello All, I have a Sierra Pickup that came in for intermittent stall that turned out to be a Crank position sensor cutting out when hot. The dilema is the sensor is mounted on the back side of the engine block @ the ten o'clock position if looking at the bac...
1990 Oldsmobile Delta 88 Royale 3.8L Cuts out, Stall, MIL Lamp on VIN: 1G3HY54CLH
This vehicle came in for drivabilty problems, the customer said it would stall and then run rough. In the last year or so we have replaced, Timing chain, cam sensor, mass air flow sensor. When we scanned for codes we got an EGR code as well as the code 41. We ... Trouble codes: 41
1997 Pontiac Bonneville SE 3.8L No Start VIN: 1G2HX52K7V
i inherited this veh from another tech in the shop. we know the car was at another shop before us. it has good cranking speed, no spark, good inj pulse (noid), no 3x ref from icm (however tech2 shows 3x rpm during cranking). here's what i have verified wit...
1998 Pontiac Firebird 5.7L MIL Lamp on VIN: 2G2EV22G8W
thanks in advance guys. my customer bought this vehicle about 2 months ago, car ran good. started it one morning and while it idled it broke #7 rod and killed the block.(thats the story) we installed a new gm crate motor. 2 weeks later came back with code po11... Trouble codes: P115
2006 Saturn Vue 3.5L steering wheel VIN: 5GZCZ63476
Customer came in for new tires and a complaint of brake pulsation intermittent, we checked front wheel bearing due to being loud and replaced it,drums were replaced due to rear pulsation no front end brake pulsation felt from front rotors and front end very ti...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Park Avenue 3.8L Cuts out VIN: 1G4CW54K72
this car is fixed!!! turns out to be two problems, first was bad connection at pcm, we drag tested each pin and found one that didn't fel right. repaired that and car no longer lost comm, with scanner. as for code P0102 we had installed two new maff sensors wi... Trouble codes: P0102.
1998 Chevrolet K2500 Cheyenne 5.7L Rear brakes VIN: 1GCGK29R3W
I'm happy to say this one is fixed. The majority of replies mentioned out of round drums, which I suspected right from the start. They were the cheap Chinese made drums which we haven't really had any problems with. I sent them down to a machine shop to be c...
2000 Chevrolet Astro 4.3L cooling system VIN: 1GCDM19W1Y
Hello techs - I have not yet gotten this van back to do a final fix as the customer is using it 12 hours/day 7days/wk for work.I will post an amended fix when I actually get it back and fixed. The vast majority of the 51 replies I received said that the intak...
2002 Chevrolet Trailblazer LS 4.2L engine VIN: 1GNDT13S42
Thank you for all replies. I changed oil with 5-30 and used ac delco filter. noise better but still present. Explained noise to customer and they seemed to accept it, not happy about it but they accepted it.
2002 Chevrolet S10 4.3L Poor Idle Quality, Stall VIN: 1GCCS19W42
Well seems the bravada is now fixed. Checked my voltages going in and coming out of the ignition switch. Voltage coming out was a bit low so I threw a ignition switch in it and it has been 3 weeks and things are going good. Happy customer!
1998 GMC Jimmy Envoy 4.3L blend door VIN: 1GKDT13W2W
Thanks for the replies. As suggested tilting dash gave easy access to temp motor. Door moved freely in pivots so motor was only failure. Too bad it's $150 assembly to fix a $2 gear. The company that makes this item is in Tenn. so I wonder if they supply parts?...
2004 Saturn L300-1 2.2L brake pedal VIN: 1G8JC54F14
Thank you for all your responses. The intermittent problem has not come back. Client just returned from Saturn dealer, where he was told: Aware of problem, only on L300, very Intermittent, when this happens: BRAKE PEDAL is OK after vehicle is RESTARTED?...
2004 Saturn Ion-2 2.2L electric steering VIN: 1G8AM12F54
well after all the new replies and researching the trouble code we have now ordered a new lower steering columb.the used one we had installed was defective.thank for all that offered great help.
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