Not necessarily, but you will have to pull the timing cover off to see what's going on.
I the Blazer will run then the timing can be checked with a timing light. If not, the there are timing marks on the timing gears that will have to be checked to see if the timing jumped.
Go for it
It does not have a timing belt. The cam is chaindriven.
I think is 8 degree BTDC ...........
0 degrees in drive bypass disconnected
Sounds like your timing chain might have jumped a notch. Timing is set by rotating the distributor. There is a nut underneath the distributor that locks it down. Timing mark is on the harmonic balancer, sorry I don't have the setting handy. I would start by checking the timing with a timing light. VBdenny
You will ned to specify as to what year.
depends on what size motor you have in it. if v8 = 18436572
The 97 Chevy Suburban doesn't have a timing belt.
call your local garage.
There is no timing belt on a 305 unless it is an aftermarket belt drive system.
It will take an experience mechanic approximately 8 hours to replace the timing belt in your 1992 Chevy Corsica. The 1992 Chevy Corsica does not have each timing chain, it has a timing belt.