I recently had my GMC 97 Suburban cooling system flushed at the dealer. They also replaced the radiator cap as part of that and since the flush, my burp tank isn't working. I'm thinking it may be the hose between the tank and the radiator or perhaps more likely, the cap they installed. It's a 13lb TVS brand 'lift' type relief and that's not was on there before.
Anyone have any ideas about this? I don't think the hose is the issue since there's no apparent leaking and am wondering if the cap is incorrectly sized somehow...
TIA,