It is when the number one cylinder has reached top dead center on the compression stroke.
Bad battery or drain in the electrical system
bring #1 piston to top dead center where both intake & exahust valves are in closed position
0 TDC/ TOP DEAD CENTER
Should be top dead center unless u are running aftermarket mods
under the dash, dead center, against fire wall. terible place for a heater core! i've changed alot of them in my time but a heater core in a 2002 buick rendevouz is a pain in the bum.
"0" or top dead center. I have a 1994 gmc picckup same thing
Inside the distributor. Usually you have to replace the whole distributor.
TAKE IT TO A GARAGE AND LET THEM INSTALL IT FOR YOU. BRING THE # 1 PISTON TO T.D.I. ( TOP DEAD CENTER )
Timing sets at 0 / ZERO TDC. (Top Dead Center )
The label under the hood of mine says it is 8 degrees before top dead center.
Dead center prods was created in 2003.
The top dead center is when the piston has reached its peak and can go no farther up, it has reached its summit. The bottom dead center is when the piston is at its lowest point.