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Prev Professional Automotive Repair Technical Discussions for May 11, 2009
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Open Help Requests for GM
Help Request Answers
1996 Buick Century Custom 3.1L steering shaft? VIN: 1G4AG55M7T
Yes, the mileage is correct, a 91 year old neighbor lady bought this car new, I have done all of the maintenance and repairs. This car has developed a squeak in the steering, ONLY with the engine running. You can be sitting still, turn wheel a couple of inches...
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2002 Buick Park Avenue 3.8L brakes VIN: 1GG4CW5KX2
When going down the road at about 60 mph and then lightly applying the brake the car vibrates terribly. The steering wheel shakes can see the fenders shaking and feel it in the seat. has all new rotors and pads removed abs fuse nothing has helped
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2003 Buick Park Avenue Ultra 3.8L mode door VIN: 1G4CU54133
Genisys scanner - in HVAC module PID for heat/ac/defrost voltage goes low and mode defaults to defrost/floor location, this occurs on its own. Operate servo with scanner - voltage goes high and all is well for a while, then goes low and mode defaults to defros...
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1997 Cadillac Seville STS 4.6L head gasket VIN: 1G6KY5298V
Hello there I have this Caddy here that it gets hot while driving. I have already talked with you all about the cause but I am about to pull the engine and remove the heads and install the inserts. My question is is there any tips or tricks I need to know to p...
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2003 Cadillac CTS 3.2L engine VIN: 1G6DM57N13
Have a Strange one here. About two weeks ago car came in for an oil leak. rerplaced valve cover. Car left on friday was back on monday. The probleme im having is finding the leak. valve covers are dry now. It has a fairly sever leak on the right side. tha last...
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1995 Chevrolet Monte Carlo Z34 3.4L Excessive Emissions, Poor Idle Quality, Surge VIN: 2G1WX12X7S
Hi Techs, This Monte Carlo idles smoothly with pretty clean tail pipe emission for the first 25 minutes of operation. After this period of time, the engine begins to surge from 500 rpm to 1300 rpm due to rich air fuel mixture. C.O. emission rose from .2% to o...
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1997 Chevrolet S10 2.2L Poor Idle Quality VIN: 1GCCS1443K
Customer is buying vehicle. Runs ok when driving but has crappy erratic idle, Long term fuels stay around -19%, idle or cruise. plugs #1 and #3 comeout with mild soot, #2 and #4 comeout clean enough to be lean. O2 was replaced (sooted)no difference except if s...
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1997 Chevrolet Express 2500 LS 5.7L tcc & 3-2 shift solenoid VIN: 1GNGG25R8V
We have a 1997 Chevy Express 2500 5.7litre automatic trans that has some problems. We replaced the computer because we had a PO132,PO138,PO155,& a PO1406. Ofter doing some testing , the o2 sensors were stuck at 1000mv all the time ...KOEO...KOER... So we unplu...
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2000 Chevrolet Silverado 1500 4.3L No Start VIN: 1GCEK14W8Y
Hey guys, this may be a Security system problem but I am not sure. This came in with no start. I checked it and it has no spark. I replaced the CKP sensor due to a no rpm condition on the scanner. It now has rpm but still no spark. The IGN module and the distr...
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2005 Chevrolet Silverado 1500 LS 5.3L Differential carrier VIN: 2GCEC13T35
Hey, guys. Two posts in a week. Good times. This Chevy is giving me a headache. It came in with a noise in the rear end, we opened it, found that the the thrust block for the locking differential was broken, pieces had damaged the teeth on the governor, the ca...
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2006 Chevrolet Impala LS 3.5L windshield washer VIN: 2G1WB58K36
I need help to find the washer pump relay.It is not in the under hood fuse box.The car is made in canada.
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1994 GMC G3500 Vandura 6.5L no shift VIN: 1GDHG31Y8S
Hi Y'all I have two of these buses in here, they have 4l80e trans in them. They both came in here not shifting at all. One had Iss and Tps faults. The other just had OSS fault. I test and replace the bad sensors on both vans. Both vans ran great all the shift...
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1997 GMC Yukon SLE 5.7L Charging VIN: 1GKEK13R8V
hello techs this vechile while driving intermitently starts to show a discharge on the volt gauge then the dash gauges like oil pressure drop oil lite comes on and check gauge lite on. if you shut vechile off its slow cranking like a weak battery. so now i tes...
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1999 GMC Yukon Denali SLE 5.7L Cuts out VIN: 1GKEK13RXX
Customer came in with the engine overheating issue: Replaced the water pump & lower intake gasket due to leakage & the radiator due to being cracked. (Did not split the intake & reseal the upper portion)Reset the cmp at 0 at 2000 rpm. Now has a misfire when un...
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2002 GMC Envoy SLE 4.2L Upshifts VIN: 1GKDT13SX2
Trans guru's we need your help on this one please.We are not a trans shop but are trying to help out a long time customer. This envoy is stuck in 1st gear,reverse works fine, no cel, no codes in history, customer stated worked fine one day & the next morning i...
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2001 Oldsmobile Aurora 4.0L Gauges/Lighting VIN: 1G3GS64C71
Help, we don't work on domestic. The boss took in this thing because we work on their imports and it seemed simple enough. Maybe it would be if we had info on it, we only have import info. Original complaint was for instruments dropping out intermitantly. Pull...
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2003 Oldsmobile Alero GL 2.2L radio VIN: 1G3NL52F13
customer brought car in with complaint of intermittent sound from radio including dinger for key in the ignition, door open etc. Display on radio still works when sound goes away. scanned for codes U1128, B1000, B1025, B1365. Radio was working, turned car off ...
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1997 Pontiac Grand Am SE 3.1L instrument cluster VIN: 1G2NE52M3V
i have this grand am that as soon as the key is on the guages and lights flash on off needles go up and down,not in any rythmatic fashion,before i condem the instrument cluster,i was wondering if any other tech has come across the same problem,any help would g...
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1999 Pontiac Bonneville SE 3.8L power door locks, power windows VIN: 1G2HX52K7X
we have this bonne in and it has a unique problem. when i got in and started vehicle, it cranked no problem but seemed to have an extended crank time before it started. once started it idled fine. because of my vertical challenge, i attempted to move the power...
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2003 Pontiac Aztek 3.4L motor VIN: 3G7DB03E63
i need to remove the motor and i wanted to see if anyone has removed one from the top and if it can be done and if you have any tricks to do it i would like to know so thank you for any help you can give to me thanks have a good day
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Fixes & Summaries for GM
Fix/Summary Answers
1994 Cadillac DeVille 4.9L Cuts out VIN: 1G6KD52BXR
Well Gene from Alabama had the correct answer. The transmission is from the wrong year of car.That is what makes the cruise control command to 100% and shut the injectors down. When we unplug the trans the car runs great. We specialize in electrical and do no... Trouble codes: 099 (Cruise control Applied).
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1995 Cadillac Eldorado ETC 4.6L Poor Idle Quality VIN: 1G6ET1296S
Called Alldata & they pulled the information from old factory service manual. The "Idle Speed control Check" proceure is KOEO, Enter diagnostics & select PCM output cycling PO07; Does the plunger extend & retract? If yes, then start engine & enter diagnost...
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2002 Cadillac Seville STS 4.6L Axle seal VIN: 1G6KY54942
Thanks to all that replied, checked play in axle is loose does need bushing called trans. shop to schedule in and waiting on customer to o.k. again thanks to all. Phil
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1949 Chevrolet std 5.0L Hesitation, MIL Lamp on VIN: KAA5703901
Thanks for all the help on this car! I replaced the pickup coil and also rerouted a wire from the alternator that ran right behind the distributor.I also found egr solenoid vac. lines hooked up wrong. After all these changes car runs fine. Trouble codes: 42 (est circuit).
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1993 Chevrolet C3500 Cheyenne 7.4L Hesitation, MIL Lamp on VIN: 1GCHC39N2P
After talking to the customer again he said that he had to many things to do and couldn't bring the truck back before the post needed to be closed. I did re check for an o2 and their is not one any wear on the truck. This is a good customer and i Know he will ...
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1995 Chevrolet K2500 Cheyenne 6.5L Excessive Emissions, black smoke VIN: 2GCFK29S5S
we replaced the injection pump and found that we still had low power, we unhooked the exhaust and the power came back os the poor runing also pulged up the exhaust. Trouble codes: 33 (map sensor input high).
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2000 Chevrolet Venture LS 3.4L cruise VIN: 1GNDX03E54
THANKS TO ALL OF YOU THAT REPLIED. THIS WAS A VERY SIMPLE BUT COMPLICATED ONE. I NEVER WOULD HAVE THOUGHT A BRAKE LIGHT BULB WOULD CAUSE THE CRUISE NOT TO WORK. PASS SIDE BREAK LIGHT WAS OUT. REPLACED BULB AND ALL IS WELL. THANK AGAIN TO ALL OF YOU WHO TO...
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2002 Chevrolet Suburban 2500 LT 6.0L fuel gauge VIN: 3GNGK26U62
tHANKS FOR THE HELP. AFTER MEASURING RESISTANCE VALUES AT COMPUTER FOUND REAR SENDING UNIT LOOKING LIKE THE CULPRIT. WHEN GAUGE READING EMPTY AND LOW FUEL THEN WHEN CUSTOMER FILLS THE TANK AND GAUGE READS 3/4 AND NO LOW FUEL REAR RESISTANCE ONLY AT REAR TANK D...
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2002 Chevrolet Malibu LS 3.1L abs VIN: 1G1NE52J52
Well I did find out that the ecbm was bad. I did not back probe at the connector i used a wire piercing device. The customer chose to drive the vehicle as is due to the price of the fix. Thanks to all those who helped with thier respones.
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2003 Chevrolet S10 2.2L Instrument lights on VIN: IGCCS14H73
Hello, No Luck with Ignition switch.We Took It Apart to make sure it Was installed correctly and It Was. The customer is Taking it To the dealer where his friend works To try A bcm. I wasnt getting paid for This One and didnt want To spend to Much of the sh...
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2003 Chevrolet Suburban 1500 LT 5.3L No Start VIN: 1GNFK16Z53
Repaired ground on back of cyl. head wire was broke 3-6 in. in the harness. and replaced pcm. thanks for all the help. Trouble codes: P1518.
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2005 Chevrolet Impala 3.4L ebcm/wheel sensor VIN: 2G1WF52E85
Thanks to all who replied. The problem was in the wiring about a foot or so encased in the wire casing. Replaced sensor wire and took care of the problem. When i was testing the wire I was getting good readings but the problem was an intermittent so [...] mus...
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1998 GMC Savana 2500 5.0L No Start VIN: 1GTFG25M6W
THE PCM THE SALVAGE YARD SENT ME WAS OUT OF AN S-10 P/U . SEEMED MORE BEAT UP THAN THE ONE I HAD . I TOOK ALEK'S ADVICE AND CALLED NAPA . THEY HAD ONE FOR ABOUT 1/3 THE PRICE . I GAVE THEM THE VIN AND THEY FLASHED IT . ALL I HAD TO DO WAS PASS-KEY RELEARN AN...
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2006 GMC Canyon SLE 2.8L wipers VIN: 1GTCS14896
ok, I went the the gut feeling of the BCM... replaced unit and had it programmed...BINGO we now have control of the system. This system has no circuit board on the motor.. it is just a 2 speed motor with a park output to the BCM...Thanks to everyone who took ...
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