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How to Replace Radiator Cap 1988-98 GMC Sierra K1500
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Tools used
No Tools Needed
1. Removing and Installing the Radiator Cap
Press the cap firmly and rotate two clicks counterclockwise
Press the cap firmly and rotate it two clicks clockwise
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Be sure your vehicle is not hot when performing this procedure. When the vehicle has cooled, place your hand over the radiator cap, push down firmly, and rotate two clicks counterclockwise until you can remove the cap.
Now, one of the reasons you might want to replace these is this gasket down here, where the seal at the top goes bad and doesn't keep the correct pressure inside of your cooling system. This can create leaks, as well as issues with other components, your heat, and the temperature of the vehicle. So if yours isn't holding the proper pressure in the vehicle, this new cap from 1A Auto will simply pop on, push down, two clicks clockwise, and fix you up right.
Thanks for watching. Visit us at 1AAuto.com for quality auto parts, fast and free shipping, and the best customer service in the industry.
RC27
In Stock
Product Reviews
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4.88/ 5.08
8 reviews
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Basic part, HUGE difference.
Bill
June 11, 2018
Had an overheating issue with my Camaro. Looked online, and the suggestion was to replace the Rad cap. Went to a national retailer, and bought a after market cap. Fitment was loose, and issue was not solved. Went to the dealer, didnt have an AC Delco cap in stock, and was $$$$, and was 3-5 days out. Checked 1a, in stock, cheap as hell, and had it in 2 days! (and didnt pay for express shipping).
Problem solved!
Guy
November 21, 2021
Exact fit
Duane
July 18, 2022
Works good I hope you can start including it with the radiator because stick caps dont work on your radiators but together they work great
Tyler
November 23, 2022
Arrived in timely fashion reasonably priced and functions as indicated
Great part
Moises
April 10, 2024
Great Quality!!
Steve
April 23, 2024
Cap fit perfectly...stopped the radiator leak.
Another successful purchase from 1A Auto
Dustin
April 30, 2024
as ordered and fit perfectly in my 1995 GMC Sierra
Perfect fit
Charles
May 24, 2024
Fits perfectly on new radiator.
Customer Q&A
Will the same radiator cap work on a 2.8 engine ?June 14, 2022
Daryl H
10
Please enter your vehicle's year make and model in the search bar at the top of the page. This will display parts guaranteed to fit your vehicle. Just be sure to verify all of the information shown in the Vehicle Fit tab before ordering.
June 14, 2022
Emma F
Customer service
877-844-3393
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