Tensioner belt was replaced on 1992 grand prix but still wont start. troubleshooting needed.

SOURCE: '98 grand prix GTP belt tensioner replacement

I didnt have to remove my alternator, I just used a 15 mm wrench to remove the left-hand threaded bolt holding the tensioner on. hope this helps

SOURCE: replace the belt tensioner on a 2002 Grand Prix SE?

It is not very hard. You need to turn the bolt in opposite direction while applying pressure to the back side

SOURCE: serpentine belt replacement

You will only need to locate the fan belt diagram to replace it on correctly and a 1/2 breaker bar or ratchet to back off the tension er while replacing belts check the tension-er bearing if it feels ruff when you turn it replace it. Check water pump also to see if it turns smooth same with the alt.

SOURCE: trying to change a serpentine belt on a 1997

The diagrams for serpentine belts are usually on a sticker underneath the hood or on the crossmember at the front of the engine bay. These will also indicate the location of the tensioner pulley.

Regards,
matt

SOURCE: My GXP Grand Prix shreded

You mean replace the tensioner assy , thats a common problem. If it has an idler pully, replace that too. Diagrams are easy to find , even easier if you provide the year and engine size of your car.