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Prev Professional Automotive Repair Technical Discussions for January 27, 2010
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Open Help Requests for GM
Help Request Answers
1994 Buick LeSabre Custom 3.8L Bogging VIN: 1G4HP52L9R
All right this Buick has a bog on accel only when warm and the longer you drive it the worse it gets. It occurs when you attempt to accelerate with more then 65% throttle and if you accelerate slowly you can go as fast as you like. We checked fuel pressure and... Trouble codes: P1565 (Cruise servo)
2001 Buick Park Avenue 3.8L Hesitation, Cuts out, Extended Crank VIN: 1G4CW54K61
Hey We have a Buick 3800 "K" motor with and intermittent extended crank. Customer also complained that the Tach was jumping and car jerked once at the same time. First time in he had a couple of cracked coils and one arcing. All were corroded at the towers. W... Trouble codes: P0336 (Crank Position sensor Per formance), P0327, P0332 (Knock sensor 2)
2003 Cadillac DeVille 4.6L Surge, Misfire, MIL Lamp on VIN: 1G6KD54YX3
Just wondering if anyone else has experienced this "No Joy" condition on any of these Northstar Engines. I have already replaced both Upper & Lower CKP Sensors with brand new GM Parts, still setting DTC P0385 CKP Circuit B. Engine also has intermittent slight ... Trouble codes: P0385 (Upper CKP Sensor B Circuit)
1999 Chevrolet C2500 6.5L No Start VIN: 1GCGC24F1X
Good ol 6.5 no start. Let me start with the code.Has passlock code but fuel pump is active while cranking and present owner has never had a resistor key. I believe passlock has been bypassed. Customer complaint. Sometimes wouldn't start then this week will nev... Trouble codes: P1631 (testing and results)
1999 Chevrolet Tahoe 5.7L No Start VIN: 3GNEK18R1X
Thanks in advance for the help, This 1999 chevy Tahoe come in from other shop that had replaced the fuel pump module assy, With a new GM unit with revised pigtail. Intermittently the truck will spin over with no start fuel pump is not coming on.Scanned system ...
2000 Chevrolet Venture LS 3.4L Engine VIN: 1GNDX03E9Y
OK this vehicle engine is dead, and when i check it there was alot of coolant in the engine, over heating,lost of coolant and driver keep adding coolant. I recommend that the engine be replace, I need advice on removing this engine, should i take it out from t...
2000 Chevrolet Malibu 3.1L Stall, FUEL PRESSURE DROP VIN: 1G1ND52J5Y
Complaint was that car would die at times and not restart sometimes. When we first checked out car, there was no fuel pressure. Replaced fuel pump and car still died after a long run. We noticed that the fuel pressure drops quickly after priming system, but ha...
2004 Chevrolet Trailblazer LS 4.2L Battery Light VIN: 1GNDT135X4
Hello everybody. We have this trailblazer with a battery light "dimly illuminated". We only noticed this after flushing the transmission. The customer is a trusted customer and said it was not on before. We checked for miliamp draw (15 miliamps), charging at 1...
2004 Chevrolet Trailblazer EXT LS 4.2L front differential VIN: 1GNET16S64
As listed in repair history we replaced front diff. with used part (original was pretty much destroyed w/ hole in case, cracked case, damaged ring & pinion) in December. Vehicle back in today with same symptoms, ring & pinion are visibly damaged again(can see ...
2004 Chevrolet Avalanche 1500 Z71 5.3L Dash lights and radio VIN: 3GNEK12T24
Hi folks: this avalance shuts down everything when you exit the vehicle like it should but as you walk away from the vehicle the dash lights back up and the radio sparks back to life. If you dont catch it the battery will die by the time you get back to it the...
2005 Chevrolet Trailblazer LS 4.2L Mechanical VIN: 1GNDT13S45
Vehicle was towed in for possible headgasket. It is not loosing coolant it is burning oil bad. can not see in shop if started. 1st 4.2 weve had with a problem. I have read about the headgasket problems but nothing about oil burning. No oil in air box. Do these...
2005 Chevrolet Cobalt 2.2L Ignition VIN: 1G1AK12F45
Thanks Guys for helping me. My problem is the key WILL remove From the ignition cylinder in the ACC Position. The Key Will not turn to the off position. Agian I can Remove the key from the Cylinder but that is when the key is in the ACC position. so naturally ...
2005 Chevrolet Silverado 2500 HD 6.0L No Start VIN: 1GCHK23225
Have this 05 chevy come in on the hook with a no-start. We scanned it to check codes, could not read data. Found bad cig light fuse, replaced it and could read data. Would not start - cranked well. Data showed very low fuel pressure. Primed fuel system with fi...
2006 Chevrolet Equinox LT 3.4L abs VIN: 2CNDL63F36
This car came in for a brake grind. All the brake pads are good. but on test drive. The ABS motor comes on as you slow to a stop. Below 8mph and not in a skid. wheel speed sensors all read the some 6-8 mph when this happens. I hope someone has seen this one be...
2008 Chevrolet Uplander 3.9L abs/traction VIN: 1GNDV23W48
abs/traction control code c0131 traction control pressure circuit. conditions for setting codes the 2 master cylinder pressure sensors do not correlate. i am using a tech2 the only pressure sensors i see one is in voltage the other pressure kpa has any one ran...
2000 GMC 3500HD 7.4L Misfire VIN: 1GDKC34J5Y
Engine idles fine and will rev fine if you give it just a little throttle. Try to give it a heavy throttle and the engine starts missing, if the throttle is held steady at any RPM the engine runs smooth with no miss but as soon as you try to give it some throt... Trouble codes: P0131 (p0134-), P0134 (p0135-), P0135 (p0154-), P0154 (p0155-), P0155 (p0171-), P0171 (testing and results)
2002 GMC Savana 3500 5.7L No Start VIN: 1GTHG39R32
The van was towed in and on preliminary check had no spark from distributer but good at coil. Distributer cap and rotor were replaced and we then had good spark at plugs. Plugs are in good shape. Still no start. Checked fuel presure. It was in range (I know ho... Trouble codes: P1336, 91638 (testing and results)
2004 Pontiac Grand Prix GT2 3.8L abs VIN: 2G2WS54284
Vehicle came in for ABS coming on while driving slow at approx. parking lot speeds. Confirmed ABS does come on, no lights on dash, no codes present in history. When driving with scanner on vehicle found that the LF, LR, and RR inlet solenoid were being trigger...
1998 Saturn SC2 1.9L readdiness monitors VIN: 1GBXC5273W
Relaced t-stat due to low coolant temps. Replaced radiator dut to a leak. Cleared codes test drove to reset monitors and checck for any new codes or repete of the previous codes. After lots of driving, monitors have yet to reset Car came in with the same monit... Trouble codes: P0341, P1599, P1620

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Park Avenue 3.8L No Start VIN: 1G4CW52K3W
Thank you for all of the prompt responces. Everybody had great ideas. I learned that this system with the chip embeded into the plastic key handle is the passkey III. The solution was to replace and reprogram the passkey module. I purchased a steering column... Trouble codes: P1626 (anti-theft fuel enable circuit).
1993 Chevrolet S10 4.3L No Start VIN: IGCCTI9ZXP
I'm going to start this fix saying,This site has the best people and tech's to be affiliated with. To have 22 relies from 4 different countries in a matter of hours makes the battle to hit these vehicles head on everyday possible. so with that said it is fixe...
2000 Chevrolet Blazer LS 4.3L Dash panel VIN: 1GNDT13W4Y
I found a borken/corroded red power wire going into the bottom of the underhood fuse box. Repaired the wire and everything seem ok. Thank you for all your help.
2002 Chevrolet Impala 3.8L Misfire VIN: 2G1WF55KX2
Thank you to all who replied! There were a few things that we forgot to put in our post that we tested. We did a vacuum smoke check of intake and found no leaks. We also suspected a weak valve spring and replaced with no change before our post. While we had ... Trouble codes: P0300.
2006 Chevrolet C7500 Kodiak C7C042 7.2L No Start, Poor Idle Quality, Surge, Cuts out, Stall, Misfire VIN: 1GBM8C1C56
We replaced the fuel pump (had to remove the high pressure oil pump, which it is mounted to) and could not get the engine to start. There was no suction/ pressure for the fuel pump. After pulling hair for many hours, we removed the pressure relief valve in the...
2002 GMC Savana 3500 5.7L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GTHG35R32
Thanks everyone for the info given. After further studying I saw that the MAP readings were jumping around intwermittently. I pulled number 7&4 spark plug and used a bore scope to see inside the cylinder while cranking. Needless to say, the exhaust valves w... Trouble codes: P0300 (multiple cylinder misfire).
2003 GMC Envoy SLE 4.2L Starting VIN: 1GKET16S23
Thanks for all the replies & not enought & correct info from my side but we found out that it had trouble code P1515 & P1516 for throttle body. When turning key on throttle body did not open it is electronic & gave it direct power but does not open stuck close...
1997 Other GM H1 6.5L Electric VIN: 137ZA9036W
Vehicle was fixed by locating a fuse that continued to pop & replacing with larger fuse. Had 5 amp fuse in slot & needed 15 amp. Still working on vehicle for other issue but so far doing ok.
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