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Prev Professional Automotive Repair Technical Discussions for July 11, 2011
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Open Help Requests for GM
Help Request Answers
2002 Chevrolet Malibu 3.1L Radio VIN: 1G1NE52J42
This vehicle came to me with 2 complaints. The radio won't shut off with the key and there's a draw of .8 amps on the battery and it goes dead. I've traced it down to pulling the IPC/HVAC fuse in the instrument panel fuse block but then the draw went away and ...
2004 Chevrolet Blazer LS 4.3L front differential VIN: 1GNDT13X34
Hello Fellow Tech's I have this 2004 Chevrolet Blazer that the 4x4 tries to engage the front axle on hard acceleration, At around 40-45 MPH. during a visual inspection we noticed the front differential low on fluid and leakage from the right housing tube to di...
2005 Chevrolet Express 2500 4.8L Coolant loss VIN: 1GCGG29V75
Have a fleet of Express Van with 170K to 215K that are having coolant loss with no signs of where it is going. Have pressure tested hot and cold with no results. At every oil change collant res is empty and radiator is pretty low. have read about some problems...
2006 Chevrolet Equinox LT 3.4L Rear Axle VIN: 2CND173FX6
This vehichle has int squeek from rear sounds like chirp or squeel.
2007 Chevrolet Express 2500 6.0L Power Windows VIN: 1GCGG29U67
Installed new switch find no voltage problems or short to ground
1994 Geo Metro 1.0L High gear starts VIN: 2C1MR2460R
Metro came in with intermittant high gear starts. As the problem happens TCM provides no voltage to the solenoids. A code check for trans revealed code 12 (pass code--no problem). During the time when the car is acting up I cannot get the pass code to flash....
2003 GMC Sierra 1500 4.8L Cuts out VIN: 1GTEC14V63
cutomer brought truck to shop saying it dies out on him. no trouble codes found (in current, history or pending codes) truck idles fine in park, shift to reverse or drive and truck dies unless we're giving it more fuel w/ accelerator pedal. truck running shows...
2004 GMC Yukon XL 1500 SLT 5.3L ipc VIN: 1GKFK16Z34
Does anyone know if you program a new cluster without a tech 2?
2007 GMC Yukon XL 1500 Denali 6.2L No Start, Cuts out VIN: 1GKFK6687J
original fuel pump would not hold any pressur, replaced fuel pump, customer said truck would just crank no start, also notice the pressure gage needle would bounce up and down, truck quite agian after long hard run, would allways start back up at the
2008 Hummer H3 3.7L oil VIN: 5GTEN13E98
This is a very clean 31k miles 5 cyl H3. Last oil change was made 5k miles ago. Client noticed a engine different noise. In fact noise was caused by a worn out rod bearing. Because engine was running with 1.6 quarts of oil!!! Engine is now disassembled. Cons...
2000 Pontiac Montana 3.4L Misfire VIN: 1GMDX03E2Y
This van misses in any gear at around 2000-2500rpm. No SES light on. We have tried switching out the ignition module and coils - didn't help. Unplugging the 24X crank sensor at the balancer got rid of the misfires but turned the light on. Replaced the crank se...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Regal LS 3.8L ABS module VIN: 2G4WB52K9W
I broke my own rule. Never buy used electronic parts. After we found another module it is fixed. Thanks for all the help and suggestions
2000 Buick LeSabre Limited 3.8L Transmission Dead VIN: 1G4HR54K3Y
First of all, Thank You to all who responded to this mystery. Brian from Michigan ultimately nailed it with the PPB broadcast code. Albeit the PPB transmission was harder to find than the PAB, we found a good clean one at a reasonable price. Changed the fil...
1996 Chevrolet Astro 4.3L Converter/ seal VIN: 1GNDM19W9T
Thank you so much for all the replys. In accordance with the concern many of you expressed regarding ballance in the converter, I changed it. This made almost no difference to the vibration. A tech friend of mine said that he has replaced several flex plates...
1997 Chevrolet K2500 Silverado 6.5L Stall, MIL Lamp on VIN: 1GTGK29F9V
finally i replace the fuel injector pump complete and everything ok, thank all of you, Robert Trouble codes: P1218.
2000 Chevrolet S10 2.2L passlock VIN: 1GCCS1955Y
I installed a key and cylinder fron the auto parts and it started right up, didn't even have to re-learn. I was under the presumption that the housing with the sensor would need replacing. We got by cheap!! By the way, I haven't found a way to by-pass the syst...
2005 Chevrolet Trailblazer EXT LT 5.3L Cuts out VIN: 1GNET16M15
This one ended up needing an under hood fuse block. Tested ground wire for power train relay at fuse block. Relay connector in fuse block would lose ground, wire in harness was still grounded. Fuse block circuit would go open when vehicle got hot. New fuse blo... Trouble codes: P0443, P1516, P1682, P2101, P0689.
1997 GMC C3500 Sierra SL 6.5L Surge VIN: 1GTHC33F2V
I replaced the fuel driver solenoid, again. The problem has not presented itself since. Prior to replacement, it would have surging fits atleast once every drive cycle as long as the accelerator was depressed.
2004 GMC Yukon SLE 5.3L Misfire, MIL Lamp on VIN: 1GKFK16T54
So this one is fixed . While the vehicle was running if you unplugged the cam sensor it would affect the way it ran . This seemed odd since on the scope there was no cam sensor pattern . So we removed the signal return wire from the pcm connector and there it ... Trouble codes: P0342, P0343, P0200.
2000 Oldsmobile Bravada 4.3L T-case VIN: 1GHDT13W1Y
we replaced the t case assembly and hasent returned
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