Tagged: 5.3L

4.8L, 5.3L, 6.0L GM Truck rough idle? Trouble Codes PO300, PO171, PO174 and PO332? 25

4.8L, 5.3L, 6.0L GM Truck rough idle? Trouble Codes PO300, PO171, PO174 and PO332?

These two conditions seem to be very common, and requires similar repair procedures (removal of the intake manifold). Gm has recognized these problems and has issued a parts revision and TSB (Technical Service Bulletin)...

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