Changing spark plugs and wires

Tiny
PLSIMC.JWS
  • MEMBER
  • 1995 GMC C1500
  • 100,054 MILES
Chicken timing need to know firing order and the number one top dead center be where my rotor should be pointing
Sunday, August 17th, 2025 AT 1:56 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Hi:

We would be happy to help, but we need to know the size engine you have. See the list below (pic 1).

Pic 2 shows the info for a 5.7L. Most of them are the same, but I would rather confirm the engine size to be certain.

Let me know if the attachment helped or if it is a different engine.

Take care,

Joe

See pics below. Note, I highlighted cylinder 1 on the cap and engine block. At the crankshaft, there will be a beveled line that should be even with the TDC indicator.
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Sunday, August 17th, 2025 AT 8:24 PM

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