Originally Posted by 700Rocket
Most common issues with less miles:
Wire harness can rub on metal support behind glove box. Do a search for more information.
DURING THE TEST DRIVE CHECK THE OPERATION OF EVERYTHING ELECTRICAL, with the remote lock, unlock, trunk release (distance the key fob works), HVAC controls, radio functions, gauge cluster illumination, drive it for a shit ton of miles with lots of hard right corners (random horn beeps). Traction control on at start is normal, take it off and on. My cluster was replaced at 30k.
Fuel line could rub on fuel rail cover near drivers rear of engine. Will burn car to the ground if it does rub a hole in the line.
PULL THE PLASTIC COVER ON THE DRIVERS SIDE, look at the line for rubbing.
Radiator tank will leak at some time
TANK OR RADIATORS HAVE BEEN KNOWN TO LEAK, check under the front end for wet spots and fluid. My tank was replaced at 24k.
Battery drain issues if car is stored for 2-3 weeks without running.
CHECK THE AGE OF THE BATTERY, if its got a problem sitting idle on a dealers lot will surely kill it. My battery was replaced by GM prior to my original purchase when the car only had 123 miles on it. I assumed the issue was from sitting on the lot but after reading 700rocket's post I've gone hmmmm... since the Delco battery the dealership installed back in 06 is still going strong and my car sits for weeks during the winter without starting or using a tender.
Rear spring sag causing improper tire wear.
REAR SPRINGS FROM FACTORY ARE SAGGED, PERIOD! THIS WAS DUE TO THE CARS BEING TRANSPORTED FROM OZ BEING STRAPPED DOWN FOR OCEAN TRANSPORT THAT TOOK A MONTH TO COMPLETE. Its more pronounced with an IRS suspension and you can check the rear tires for uneven wear occurring on the inside tread. Having 70k on the odo its hard to base ride height because many have installed lowering springs... but if it looks lowered in the rear compared to the fron, chances are they're sagged. I got 28k out of my rear tires before the inner tread was down to the steel mesh. I installed drag springs to raise the ride height slightly and haven't noticed uneven wear after putting 10k on the new rubber. Oh, and my idea of tire rotation is roast off the rears, shift front to back and buy new fronts.
Strut rub causing improper tire wear. AND Radius Rod bushings should be replaced as OEM bushing were not the best.
FRONT SUSPENSION CAN BE PROBLEMATIC, listen for popping, etc with the steering wheel hard over both going forward and reverse. as for the rub, again check for inner tire wear on the edge. Look for cupping on all 4 tires which will indicate either unbalanced tire condition, faulty wheel bearings, loose parts, fatigued springs, weak shock absorbers and alignment issues.
Leather on top of rear seats gets hard if not treated, seams will split or seperate.
VERY COMMON PROBLEM, Mine were repaired 2 years ago, not replaced and have held up. Recently, I noticed the drivers seat back seam at shoulder height is starting to come undone.
Steering wheel spokes will delaminate and look bad.
LOOK FOR BUBBLING IN THE SILVER SPOKE ON THE STEERING WHEEL. Mine was replaced twice several years ago and hasn't reoccurred. I've never used any type of chemicals on the steering wheel.
Head Liner could sag if its a southern state car
I never had this problem.
1) Check the door handle paint for flaking or pealing.
2) Check the rear carpets for water ingress and the front passenger side. My passenger side door weather stripping had to be replaced.
3) Manual trans, check the clutch master oil color... dark=bad. Check all the fluids, assume nothing!!
4) Check the lip on the rear wheel wells to see if they have been rolled or ground down. This is an unscientific way to quickly check if the car has been maintained in stock condition or modded to accomodate wider rubber so it can transmit a beat down via power adders. (not saying its fool proof, just a quick check)
5) While I'm thinking of beat downs... my GTO's bone stock and like I've previously stated I like to smoke the rear rubber off the rims. This has partly been the cause for my drive shaft carry bearing to fail at 36k. To check this the car should be on a lift.... don't hesitate to make them do it.... push up on either half of the drive shaft and see if it easily moves up. If so look for cracks in the rubber. There are no replacements parts short of changing out the drive shaft completely. While its in the air look the underside over. Red bits in the suspension are generally from Pedders, while blue are from Lovells.... black are stock.
6) Check how stiff the key feels in the ignition when turning it to start the engine. There's a sticking problem that has been an issue for some... mine's a bit tight during the heat of the summer but has never not turned.
7) In addition to getting a Carfax, get a GMVIS report by having a GM dealership run the VIN or posting a request on this link.
Need GMVIS report? - Post in here - LS1GTO.com Forums
Have fun with your search.