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Prev Professional Automotive Repair Technical Discussions for November 19, 2008
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Open Help Requests for GM
Help Request Answers
1988 Buick Century Limited 3.8L Mechanical VIN: 1G4AL5133J
We have a 1988, buick century that came to us as a no-start. customer said it needed a fuel pump. I checked fuel pressure-none, spark-none, then injector pulse-none. I checked all fuses and found computer fuse had been blown. Not sure what caused this, think c...
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2002 Buick LeSabre Custom 3.8L lower intake manifold VIN: 1G4HP54K42
Customer complained of oil burning smell in car under load. We cleaned engine once and inspected, but couldn't find any leaks. Customer drove car pretty hard and now oil has returned. It is puddling on the front side of the lower intake manifold valley (metal ...
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1998 Cadillac DeVille 4.6L Speedometer
One for you Cadillac guys. Got this '98 Deville that the digital speedometer and odometer do no light up. Everything else on the dash works fine. When going into vehicle with Tech 2 all ipc data looks good and no codes. The only thing that is missing on the wi...
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1988 Chevrolet V30 Silverado 6.2L knocking under load VIN: 1GCHV33J6J
vehicle came in with bad head gaskets, remove heads and found the typical cracks between valves. installed reworked 6.5 heads, had injectors tested and repaired, put vehicle all back togeather, but now we have what i call detonation, (fuel knock under load) if...
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1995 Chevrolet K2500 Cheyenne 6.5L No Start, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Poor Fuel Economy, MIL Lamp on VIN: 1GCGK24F85
I got into this truck orignally on a no start condition with no codes present. I diagnosed it to be a defective PMD module. I replaced the injector pump assembly - new - Vehicle started, no codes life was good. Yet shortly after repairs, about 30 miles, the cu... Trouble codes: 17 (high resoulition fault), 18 (Pump cam referance pulse), 35 (injector pulse width), 54 (TIO fault)
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1996 Chevrolet Tahoe LS 5.7L waterpump VIN: 1GNEK13R4T
Customer came in with a leaking waterpump. We replace the water pump with a new one. Purged the system and everything seemed fine. Customer came back the next day, truck was overheating but then cooled right off. Customer could also hear water rushing through ...
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2000 Chevrolet Impala 3.8L Hesitation VIN: 2G1WH55KY9
customer came in with complaint of noise under hood on first start up in morning and sometimes during the day and when this happens the car will want to stall if you try to go.as soon as the noise stops the car runs fine.the air pump was the only thing that wa...
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2002 Chevrolet Express 2500 5.7L blower fuse VIN: 1GCFG25M92
Van came in with blown blower fuse in the inside fuse block. Driver stated that fuse would blow in position 2 or 3 but would run all day in low or high. We put a breaker in and confirmed this. We started with a resistor and have since replaced the control head...
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2006 Chevrolet Impala LS 3.5L washers VIN: 2G1WB58N69
cannot locate washer relay .its suppose to be in the junction block under the hood but its not .power comes from the relay to the washer fuse.no power to fuse.have checked alldata diagrams to no avail.dealer lists part with no part #.any help on this would be ...
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1999 GMC Safari SL 4.3L Unknown VIN: 1GKDM19WXX
iATN, I have a 1999 GMC Safari with the ABS lamp on and no scanner communication. Fuse, power & ground are all good for the ABS Module. Is there any common breaks anywhere in the harness or is this a module problem. Thanks for the help.
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2001 GMC Jimmy SLE 4.3L Misfire VIN: 1GKDT13W81
I hope one of you guys have seen this before, this jimmy came in with a p0300 code and slight rough running all the time, lots of mew parts, misfire mostly on cyl 4 , checked wires, plugs, fuel pressure, customer decided to change injectors instead of cleaning... Trouble codes: P0300
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2005 GMC Sierra 2500 HD SLE 6.6L No Start VIN: 1GTHK29265
i have a 6.6 duramax wiyh no start condition and no codes. went through all vacum test and all passed. cked fuel rail press with comp. and found only 250 p.s.i. at crank. replaced fuel press relief valve with no change. also did a return volume test on inj. an...
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1989 Oldsmobile Delta 88 Royale Brougham 3.8L blower motor control module VIN: 1G3HY54C8K
blower motor runs on high, even after vehicle is shut off. have replaced blower motor control module 3 times. after replacement, everything is fine for about 3 weeks, then control module fails again. last 2 modules have beed ac delco. blower motor was replaced...
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1997 Pontiac Sunfire SE 2.2L Excessive Emissions, Misfire, VIN: 3G2JB524VS
vehicle failed smog test due to mil on. had random misfires on all cylinders. sputtered in park until rpm reaches about 3300, then smoothes out and rpm increases to 3900. ease up on gas and then rpm drops and starts sputtering again. scan tool shows that timin... Trouble codes: P0300, P0172
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1997 Pontiac Bonneville SE 3.8L heater VIN: 1G2HX52K3V
this is my wifes car so i have to fix this if you know what i mean. car has never given any problem till now, all of a sudden it will blow warm air but not hot. contols seem to work ok etc defrost, center vents, and foot well. any one seen this before
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Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick LeSabre Custom 3.8L Starting VIN: 1G4HR52L95
Thanks to all of you who replied, and all replies were great. I tested both cam and crank sensors = proper patterns were there on start up and during accel. I had the starter removed, and tested at my rebuilder = great without a problem. As a matter of fact,...
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1998 Cadillac Eldorado ESC 4.6L Stall VIN: 1G6EL12Y8W
THANKS FOR EVERYONES HELP ON THIS ONE IT TURNED OUT TO BE A BAD INTAKE MANIFOLD GASKET AND THE FUEL PRESSURE REGULATOR HAD A BAD DIAPHRAM SO FUEL WAS GETTING INTO THE VACUUM LINES AND CAUSING THE ROLLING IDLE THAT WAS NOTICED AFTER WE REPLACE INTAKE GASKETS. ... Trouble codes: P0175 (fuel system rich bank 1), P0176 (fuel system rich bank 2).
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1981 Chevrolet Corvette 5.7L Master cylinder VIN: 1GLAY8768B
Ok; The repair involved the right rear caliper, this was the only caliper that displayed any air every time it was bled. Car is parked for winter so if all goes well I wont get a phone call in the spring...Thanks to all that responded.
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1989 Chevrolet S10 4.3L Excessive Emissions, Hesitation, Stall, Poor Fuel Economy, MIL Lamp on VIN: 1GCGT19Z7K
We found the EGR valve intrmitently sticking open. When checking in the shop it always worked, but one time after a test drive we noticed pintle open. Replaced valve, runs much better. Thanks for the help.
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2001 Chevrolet Silverado 2500 6.0L Cam bearings VIN: 1GCHC29U91
I could not positively identify a root cause. The cam bearings WERE installed correctly and were still in very good shape. The only thing I hadn't replaced initially was the pickup tube o-ring, (it seemed to still provide a good seal). So my only theory is ...
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2007 GMC Yukon XL 2500 SLE 6.0L rain sense wipers VIN: K57R260594
Bradley's recommendation on how to check the operation lead us to remove the sensor and upon doing that we noticed some haze on the glass where the sensor "looks" for rain. We wiped it clean and also wiped the sensor, reinstalled it and it works properly now. ...
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1993 Pontiac Grand Am SE 3.3L ign and fuel VIN: 162NE51N3P
thanks again to all that responded.two major problems that effect us as techs are faulty new parts and misinformation new crank sensor was the problem and it was oem not aftermarket as i said in post as i took over job while other tech went on holidays ,and no...
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2004 Saturn Vue 3.5L Poor Fuel Economy VIN: VGZCZ63484
Yesterday the owners returned from a trip to Texas. They told me that they where bucking a 30mph head wind on the outward journey and mpg was 18mpg. The return journey was in calm weather and they recorded 26 mpg. Both journeys being on 100% gasoline. So, I ...
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2006 Saturn Ion-3 2.2L lock cylinder VIN: 1G8AL55FX6
Thanks to Dave for the info. Mission accomplished. Wanted to make sure I didn't damage anything. Now for Timothy of Georgia, are you always this negative with your replies? I use IATN daily and get most of what I need from the forums. Remarks like yours do...
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