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Prev Professional Automotive Repair Technical Discussions for July 22, 2008
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Open Help Requests for GM
Help Request Answers
1941 Buick roadmaster 322CID radiator
car is in very good condition overheats to 210 deg in 4-5 minutes driving or 8-10 if running in shop , water flushed to check for sludge etc ,none fairly clean no air bubbles in coolant , does anybody know if any of these straight 8, engines used a water distr...
2000 Buick LeSabre Custom 3.8L All Windows Door Locks Mirrors And Interior Lights VIN: 1G4HP54K6Y
Has anyone had anything like this or seen this before. Sometimes I have power to door switch most times not. Either way nothing works. Any Ideas?
2002 Buick Rendezvous CX 3.4L no crank / no run VIN: 3G5DB03EX2
This car came in a month ago for no crank, found fuse # 27 blown, fuse 27 is ING Main, replace fuse runs great. customer drove for a month, today the car died and wouldnt start. upon inspection fuse # 27 was blown again, put in another 10 amp fuse, no problems...
1992 Chevrolet C1500 Cheyenne 4.3L No Start VIN: 1GCDC14Z5N
Thanks for taking the time to read my post. We are having problems with this throttle body injection C1500 truck with manual trans.. We know that the pulse width at the injectors are too low. Its at about 2.00 milliseconds during starting when we think it shou...
1994 Chevrolet Lumina 3.1L No Start, Cuts out, Stall VIN: 2G1WL54TOR
Help me guys! I have been working on this car for two weeks. It keeps losing spark after you drive it for a couple of days. I replace the ignition module and it starts and runs fine for me. The owner will come and pickup and drive and it dies or no start. The ...
1994 Chevrolet S10 Blazer Tahoe 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1GNDT13W0R
Vehicle will not communicate with scanner but will flash a code 12 with no other codes. Check engine light stays on. Trouble codes: 12
1996 Chevrolet Blazer 4.3L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1GNDT13W5T
vehicle came in on hook cust complained of lack of power and popping noise through intake. cust stated that he replaced the fuel pump one year ago due to sugar in tank... i had noticed that the heater core hose was dripping coolant on the dist cap and coil wir... Trouble codes: P0151, P0133
2001 Chevrolet Suburban 1500 5.3L MIL Lamp on VIN: 3GNFK16T61
have a 2001 suburban here that 02 sensor will read low when 02 sensor warms up, reads okay when cold, replaced cat with one from carquest and same problem, replace again with one from napa and same problem, run b1 s2 harness to b2 s2 sensor and reads fine. 02 ... Trouble codes: P0137
2001 Chevrolet Express 1500 5.7L Hesitation, Surge, Cuts out, MIL Lamp on VIN: 1GBFG15R51
Van originally came in MIL on Scanned & TPS replaced as it was bad. 2 weeks later van back with MIL on, Scanned & found P0101. Cleaned Maf & code returned. Replaced Maf (OEM) & code still returns. Test drive & code will set in about 1km. Mil comes on at second...
2002 Chevrolet S10 LS 4.3L Misfire, MIL Lamp on VIN: 1GCDT13W12
Hello everyone, I'm working on this vehicle thats got me a bit stumped. It came in on the hook due to it was run off the road and into a pond. Water came into the vehicle to the base of the seats (not over) and was hydrolocked. I pulled out the plugs and dried... Trouble codes: P0300 (Random misfire detected)
2003 Chevrolet Tahoe LT 5.3L Hesitation, Stall VIN: 1GNEK13Z83
Thanks in advance for any help, this one is a nighmare, I have a Chevy Tahoe that intermittently, cuts out, or stalls. When it does there is a chime, the doors unlock and relock, the radio has a Ipod hook up and it kicks the Ipod off and turns back to radio, t...
2005 Chevrolet Monte Carlo LS 3.4L Misfire, MIL Lamp on VIN: 2G1WW12E65
hi all. this car came in with customer complaint of ses light on and does not shift into 4 th gear. perorm scan test found p0300 cylinder miss fire code in system, when monitoring miss fire data on scanner no 6 cylinder misses continuasly. inspected spark plug... Trouble codes: P0300 (cylinder miss fire detected)
2006 Chevrolet Uplander LS 3.5L no crank VIN: 1GNDV23L16
Customer stated vehicle will not crank over after she has driven it and stops to go in store. She states it always starts fine in the morning when the vehicle is still cool. We found the vehicle does start fine after it has been sitting. Once it is heated up i... Trouble codes: U1000 (Class two serial communication error)
2006 Chevrolet Malibu LT 3.5L Unknown VIN: 1GIZT61896
car came with sticking brakes on all wheels. it only happens once a month or twice a month. wondering what could be the possibility? as soon as you let it sit for a little bit, it will be back to normal. i felt the brake pedal to be very hard when the brakes s...
2002 GMC Envoy SLE 4.2L engine VIN: 1GK0513562
engine vibration all the time in park or drive, pry on left of eng vibration minmizes.Removed belt vibration still there,balancer does not seem to be bouncing all over the place.Just wore out?Please help!
2003 GMC Envoy XL SLE 4.2L blower motor VIN: 1GKDP13S23
Hello fellow techs. This vehicle has two issues. The first is the blower motor (when it works) stays on after you turn the igniton off and remove the key. It will run for(5-10min.) after the key is out. I replaced the ignition switch after looking at some othe...
2003 GMC Sierra 1500 SLE 5.3L ac controls VIN: 2GTEC19T53
Hello and thank you in advance for any help I can get.This truck ac was working just fine until one of the sales men put in a battery now the ac only comes out the defrost vents I have checked all volt wires and ground wires at ac controls and at mode door act...
2005 GMC Canyon Z85 SLE 3.5L abs VIN: 1GTDS13655
Customer states that on two(2)seperate occasions,dry conditions,travelling down the interstate,one time 65mph and the other time 50mph, his Canyon steered or veered and did a lane changed on its own.He also stated that the truck tried to fishtail.He was not ap...
2001 Oldsmobile Silhouette GL 3.4L Surge VIN: 1GHDX13E8Y
HI. This engine has a 200rpm surge, and no misfires, about twice a second under light load/accel when running between 40-60 mph in high gear, TCC lock. The two codes shown do not relate to the problem: the trans adapts show up once in a great while, and the Ev... Trouble codes: P0449, P1811 (max adapts long shifts)
2001 Pontiac Grand Am SE 2.4L Engine VIN: 1G2NE52T11
This car has a vibration like the harmonic balancer is bad. I canged it even though it looked ok because I didn't have any other ideas as to what it could be. At idle it has a very bad vibration. It doesn't vibrate at higher rpm's and doesn't miss it just ratt...
1997 Saturn SC2 1.9L Shift VIN: 1G8ZH1273V
this car has blown off 2 carquest filter and one saturn filter. The first one was put on after a flush. the car came back complaining of hard shifting then blow off filter gasket. I got it in replaced filter and replace the valve body with new solenoids. reset...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Park Avenue 3.8L High Idle Speed VIN: 1G4CW52K3W
The ECM was defective. I think the key was the RPM was 2800 but desired RPM was 700 on the scan tool. But the ECM happy enough to not set a code. When I flashed the second ECM the MIL was on with a "crank not learned code". The defect wouldn't finish crank rel...
1986 Chevrolet Corvette 5.7L air condition
Got 17 replies.Most said to retro fit to 134.Some said LIABILITY and LITAGATION.Not approved for mobile a/c.Not legal in cars.Contaminates yours and others machines.Not on EPA snap list.One reply used 416 for 2 years with no problems.One mentioned 402b as a dr...
1997 Chevrolet Astro 4.3L Excessive Emissions, Poor Idle Quality, Surge, Cuts out, Stall, MIL Lamp on VIN: 1GNDM19W7V
1997 Chevrolet Tahoe LS 5.7L Misfire VIN: 1GNEC13RXV
After reading what some had suggested I performed a running compression test and found the cylinder 60Lbs@ idle and 30lbs@ 2000 RPM. I decarboned the engine with GM's Top Engine Cleaner due to the fact that I found so much trash on the spark plug. After the ... Trouble codes: P0300, P0304.
2000 Chevrolet Astro 4.3L RAP (retained acc. pwr) VIN: 1GNDM19W2Y
thank you to all that responded! it turned out the rear slider door switch was at fault. nicely worn on the end. a whopping 7 dollar part not included in the diagnostic chart... anyways, the locks all work now, except the actuator for the passenger door. thank...
2002 Chevrolet Malibu 3.1L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1G1ND52JX2
hi all . i retested compression - ok , did leak down test - ok , rechecked spark plug wires , replaced fuel pressure regulator and all fuel injectors with a good set of used ones. customer took car back because she needed it for work . came in yesterday and sa...
2005 Chevrolet Equinox LT 3.4L steering VIN: 2CNDL63F85
2007 Chevrolet Uplander 3.9L Rear Suspension VIN: 1GBDV13187
There is a TSB for the rear trailing arm bushings. Even if they look good they can still cause problems. This was what I originally thought. The van is under warranty and we are a fleet shop so we sent it back to Chevy with a copy of the bulletin. They've had ...
1992 Pontiac Sunbird LE Value Leader 2.0L Engine VIN: 1G2JC51HXN
I didn't get much help on this one, only 4 replies that basically said it's not worth fixing. I'm trying to find a used motor for the car.
1997 Pontiac Bonneville SE 3.8L starter VIN: 1G2HX52K6V
Sorry it took so long to close. Customer took car since it is not acting up and has not been back. I had a lot of replies about the ignition lock cyclinder and a couple on the P/N switch. I was not comfortable changing either since I could not get it to act...
2001 Pontiac Bonneville SE 3.8L A/C Temp VIN: 1G2HX54K51
We recharged the system and added dye this time. The customer returned yesterday with no A/C. After inspection, we found dye around the front of the compressor. Hopefully this will resolve his issues.
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