Q: engine detonation on 2002 Chevrolet Silverado 1500

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Will a mass air flow sensor cause the engine to detonate when the outside air temp gets hot (above 85)
(1) Answer
I suppose it's possible for the MAF to cause some problems, but detonation? I don't think so. I'm guessing that the noise is preignition caused by carbon deposits or bad fuel. It could also be caused by a failed EGR system.
I'd consider the fuel source first (try a tank of name-brand fuel if you use the cheap stuff), if that's no help, check the running temperature of the engine and check the spark timing. I would use a scanner for those items. Check the other data as long as your at it with a scanner. If you don't have access to a scanner, find a GM technician with one.
If you've been running with very dirty oil or used cheap fuel for an extended period, then you may have carbon deposits in the combustion chambers causing detonation. You may be able to help that condition with fuel additives. Techron, from Chevron is one of the best and I use that for injector cleaning and it may be good for decarbonization.
If your engine is really detonating, not just a little ignition knock or ping, then you are in danger of damaging pistons and you need to find the cause ASAP.
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