map sensor whats its function

map sensor whats its function Sometimes when driving my Yukon it starts to hiccup and bog down as if it's trying to stall. Occasionally it might just cough more and not stall. What's going on? I changed the mass air flow sensor; are there any other sensors I should look at?
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mcgyver89 [Entry]

i have a chev or gmc engine block need to know the size an year the block#19W441749 V0307 D or 19W441749 V0307LD