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Message: <blockquote data-quote="Marky Dissod" data-source="post: 28476" data-attributes="member: 13218">Over the past year, my '02 Tahoe Z71 has SOMETIMES suffered the following IRREGULARLY INTERMITTENT symptoms:*When I step on the throttle, I get nowhere near the expected acceleration, like maybe late 80s 4.3L V6 acceleration at best?If I initially get the expected acceleration, it peters out and cannot exceed 3600RpM, even if I floor it.*There is a very small but nonzero chance that the fuel pump will 'take a break' with no prior symptoms or indications.If it 'takes a break', the break will last at least 30min (during which I & others can't smell any fuel despite desperate overcranking)*There is a slightly larger chance that the fuel pump will warn of an impending lunch break,by stumbling and under-performing slightly, and getting worse and worse, like it's tiring out and 'needs' a 'break'.The longest 'break' has been over 2hr. Once 'break time' is over, it acts normally for at least 20min.However, there have been entire months (come to think of it, WINTER!) during which I suffered no symptoms.Obviously, the 1st guess is the fuel pump, which for all I know may be GM OE from the '02 assembly line?I'm asking for any other guesses, BESIDES the fuel pump itself.What could make the fuel pump take an unapproved/unauthorised break, when I want it to keep on working?Thank you all in advance for your consideration.</blockquote>