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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 22, 2011
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Open Help Requests for GM
Help Request Answers
2003 Buick Rendezvous CX 3.4L temp. gauge VIN: 3G5DA03E33
customer came in with vehicle overheating. we can't duplicate or verify the problem. we pressure tested for leaks, made sure the fans come on. the customer says the gauge will fluctuate from the middle to the red mark and back to the middle. i checked for air ...
1992 Cadillac Eldorado Touring 4.9L Excessive Emissions VIN: 1G6EL13B4N
My problem now is high NOX. Useing All Data flow chart PFI CHART C-7 and entering ECM output E004 test light at EGR solenoid is on, wiring to PCM is good. It says to replace PCM. Sounds easy enough. 3 PCMs later and here I am looking for HELP!!! I have already...
1988 Chevrolet Corvette 5.7L belt tevsioner VIN: 1G1YY2185J
I have a customer with an 1988 corvette. I replaced the water pump the a/c compressor and the drive belt and tensioner. The belt and tensioner have been changed twice. My problem is after a short time the belt tensioner bottoms out and rattles on it's stop. Th...
1994 Chevrolet S10 4.3L No Start, Stall VIN: 1GCCS19W7R
1994 chev s/10, came in with stalling problems, customer says that it was at another shop getting fuel pump replace 2 weeks ago, seems to have fixed the problem until now, we have spark and fuel pressure at 55 psi, we replaced fuel pump and got 59 psi but same...
1995 Chevrolet Monte Carlo Z34 3.4L No Start VIN: 2G1WX12XX9
The customer states that the unit will just quit, like the key was turned off. It will restart after 1/2 to one hour. The purple ignition switch wire does not lose B+ when this happes. I could only duplicate this problem once. When it occured there was no spar...
1997 Chevrolet Camaro Z28 5.7L Poor Idle Quality, Hesitation, Surge, Stall VIN: 2G1FP22P6V
This car is completly stock kept up with regular maintence. The problem started last fall and with running high octane fuel the problem lessened. This spring we cleaned the injectors and intake system. The intake manifold gaskets were replaced due to a oil lea...
1998 Chevrolet Blazer 4.3L O2 codes VIN: 1GNDT13W4W
When we received the vehicle the owner had replaced the O2 sensors with aftermarket sensors and the codes came back on. Codes are P0135, P0147, and P0155. When we checked it we got only one code for sensor 3 bank 1. We assumed a bad O2 possibly and replaced it...
1999 Chevrolet Express 3500 5.7L 2-3 shift solinoid VIN: 1GBHG31R4Y
This van originally came in for a trans issue, we pulled codes and found a P0758. pin point testing reveled an open 2-3 shift solenoid, which we replaced along with a filter and gasket. The van shifted fine at first, on smooth roads. but when it went over bump...
2000 Chevrolet Impala 3.4L No Start VIN: 2G1WF55E07
No injector pulse. Seems to be a security issue with a twist. Key will program and engine will crank, then security light will be on steady with key on but not flashing as when programming. No codes ( using a tech 2)other than crank sensor relearn. pin checked...
2005 Chevrolet Silverado 2500 HD 6.6L injector sleeve VIN: 1GCJK3325F
I need some info from a Dumax LLY Tech. I have one thats leaking anti-freeze out of #7 injector hole. I have no combustion in the radiator though. It just has a constant water drip out passed the injector over the rockercover an on to the ground engine running...
2005 Chevrolet Express 3500 6.0L Reverse VIN: 1GBJG31U95
Van slips in reverse all the time, after driving for a few minutes, it won't move in reverse. All forward gears are strong. No codes except O2 that has been there for months. Customer states he was backing up when it started to chatter, then slip, and fin...
2004 GMC Sierra 1500 SLE 5.3L MIL Lamp on VIN: 1GTEK14T54
We have a 2004 gmc sierra that came in with codes p1125,p2125.after testing and inspection we found that some one had installed a plow and cut the app harness in 3 spots then butt conntected it back together,We replaced the harness and app sensor,cleared codes... Trouble codes: P1125, P2125
2005 GMC Envoy SLT 4.2L electronic VIN: 1GKDT13S75
vehicle came in wrecked 3 years ago hit in drivers door.left at shop no insurance. we finnally received title and decided to repair. vehicle ran when it came in.key got lost during 3 years sitting on lot. called dealer and they made us a key . the key works th...
2007 GMC Sierra 2500 HD SLT 6.6L No Start VIN: 1GTHK23697
this happen in one or two week of releaning the key you can learn one key and all the other key work with out relearning them it don't have to be the master key anty help it sound like the ecm but i don't know Trouble codes: P0513, P0633
1999 Oldsmobile Bravada 4.3L No Start, VIN: 1GHDT13W8X
OK, last year was a almost complete no-start, same basic problem exept at that time could watch data and see change while tapping on computer, replaced and has been OK since... now came back, its an intermittent no-start, shows incorrect but valid, and open ci...
2001 Oldsmobile Alero GL 3.4L abs sensor VIN: 1G3NL12E21
Had this alero come into shop for abs trac service vehicle and low tire light scanned modules had code c1222, c1226, c1245. moved vehicle around in parking lot and had noticed just sitting still moving steering wheel instead of a drop out or nothing this vehic...
2000 Saturn SL2 1.9L Harsh reverse VIN: 1G8ZK5270Y
Vehicle came in for a harsh reverse intermittent engagement. We rebuilt transmission and problem is still there. We have torqued both input and output shaft nuts to 111ft lbs. and warrantied the valve body (vbx) but still has the problem. When vehicle sits for...

Fixes & Summaries for GM
Fix/Summary Answers
2004 Chevrolet Silverado 2500 HD 8.1L blend door VIN: 1GCHK23G24
Thank all of you for the response. It come down to the fact the prior technician that had worked on the vehicle had changed the mode door not the blend door. Once new blend door went in and recalibrated all is good. Thanks again everyone.
2003 Saturn Vue 3.0L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 5GZCZ63B43
First things First, the real problem, found a broken key way on the crankshaft gear, apparently it broke when we removed the Crankshaft bolt, it was very tight, we thought it had to be removed, figured out, it didn't and put it back without ever actually remov... Trouble codes: P0341 (CMP Sensor Circuit Out Of Range).
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