1987 GMC C1500 Won't Turn Over

Avatar
LIVELY
  • MEMBER
  • 3 POSTS
Ok I have been through a ton of topics on here trying to find anything as close as possible to the prob we are having and have found very little thats close and was answered. Here's the story start to finish. This is a GMC suburban 1500 sierra classic 350 motor... I was driving down the road the other day and it literaly just shutt off. We assumed it was the alternator since there was no rumble sputter smoke overheating or anything else. SO we had it towed home and changed the alternator which we also had tested. The alternator was definitely bad but for some reason the burb still would not start. So we changed the starter since when we went to start it it would basicly click. Had the cyllanoid switch checked and it was fine. He went (hubby) made sure the new starter was shimmed up right and everything. Ok so it still would not start. Then we had the battery checked ..well it needed to be replaced. Got a new one. The starter engages the flywheel but won't turn it. Now we are down to the flywheel possibly being locked up. I am soo hoping this is not teh case. Motor isn't locked and the burb will shift and you hear the click on it when moving the gearshift. Forgive me if I do not explain enough but i am trying to give as much detail as possible. I want to elimate any possibilities of smaller causes before having to take this thing to the shop. This is literally the first time we have ever had trouble out of this vehicle. Double checked oil and trans fluid as well. No water in the oil or crud. Transmission fluid isn't burnt or smelly. All lights work fine. No burnt out fuses went ahead and rechecked them as well. Please would appreciate you advice on this. Hubby doesn't have enough tmeto actually replace a flywheel so even a rough estimate of how much that usually costs would be helpful. Well I am off after writing this book. I look forward to your replies.
Lively :roll: :lol:
Mar 9, 2006 at 7:35 PM
Advertisement
Avatar
LIVELY
  • MEMBER
  • 3 POSTS
ANyone have any ideas?
Mar 10, 2006 at 5:55 AM
Avatar
PEPPERMRJ
  • ✓Experienced Mechanic
  • 1,158 POSTS
The flywheel bolts to the torque conveter and crankshaft. If it will not move then the engine is locked up or the torque converter/trans is.

Remove the inspection cover and try to spin it with a big screwdriver. I have had the bolts come loose and lock it up.

good luck and let us know. :)
Mar 11, 2006 at 2:52 PM
Avatar
LIVELY
  • MEMBER
  • 3 POSTS
Thanks will look into that. Hehe the advice is much appreciated. I'll post what we find out tomorrow. :lol:
Lively
Mar 11, 2006 at 6:32 PM

Suggested Repair

Remove the inspection cover and try to turn the flywheel with a large screwdriver. Loose bolts between the flywheel, torque converter, and crankshaft can lock it. If it still will not move, the engine or the torque converter/transmission is locked.

Conversation Summary

A 1987 GMC C1500 Suburban with a 350 engine shut off while driving. After the alternator, starter, and battery were replaced, the starter engaged the flywheel but would not turn it. An expert advised removing the inspection cover and trying to turn the flywheel with a screwdriver, noting that loose bolts can lock it and that a no-turn condition means the engine or torque converter/transmission is locked.

Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Frequently Asked Problems for This Vehicle