Forum Discussion
deltabravo
Sep 19, 2014Nomad
deltabravo wrote:
Costco no longer sells their house brand of batteries.... they sell Interstate Battery brand.
I went back to Costco and their book didn't list an exact fit for 08-14 2500HD and 3500HD with a Duramax. The tire shop guy did say "fitment code 29" will work.
It looked too big to me.
I will pull the old batteries today and go shopping. I'm not convinced I will get the Costco (Interstate) batteries. They didn't have any specs for cranking amps on them, only amp hours.
About Tow Vehicles
From fifth wheels to teardrop trailers and everything in between.238 PostsLatest Activity: Feb 02, 2026