WFarm
Full Access Member
- Joined
- Jan 11, 2023
- Posts
- 193
- Reaction score
- 1,165
- Location
- Central Virginia
- First Name
- Paul
- Truck Year
- 1987
- Truck Model
- R1500
- Engine Size
- 350 tbi
My existing radiator cap seal is worn and weeps at pressure. It is an AC Delco RC-36 cap. All the replacements I find are RC-27 caps. Anybody know what cap originally came on a 1987 Sierra Classic 350tbi? Is there any difference between the 36 and 27 caps? Both are 15 psi.
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