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If you buy the proper plugs these days for your make and model, the spark plugs are already pre-gapped properly for your use. Unless you are using long-life (60K miles) Iridium Plugs; if you are checking the gap on old copper core plugs, it is wiser to just replace them with new ones. Champion and AC are std brands that will have the plugs for you. Otherwise, consider upgrading to DENSO or Bosch Iridum plugs and never worry about your plugs in an a very long time. Check your wires while you are at it; NAPA sells BELDEN spark plug wire which is the best in terms of quality on the American market.
2000 Chevrolet Tahoe 5.3L 323CID V8 GAS FI T - GAP=0.040"; Original equipment is iridium.
2000 Chevrolet Tahoe 4.8L 294CID V8 GAS FI V - GAP=0.040"; Original equipment is iridium.
2001 Chevrolet Tahoe 5.3L 323CID V8 GAS FI T - GAP=0.040"; Original equipment is iridium.
2001 Chevrolet Tahoe 4.8L 294CID V8 GAS FI V - GAP=0.040"; Original equipment is iridium.
2002 Chevrolet Tahoe 5.3L 323CID V8 FLEX FI Z - GAP=0.040"; Original equipment is iridium.
2002 Chevrolet Tahoe 5.3L 323CID V8 GAS FI T - GAP=0.040"; Original equipment is iridium.
2002 Chevrolet Tahoe 4.8L 294CID V8 GAS FI V - GAP=0.040"; Original equipment is iridium.
2003 Chevrolet Tahoe 5.3L 323CID V8 FLEX FI Z - GAP=0.040"; Original equipment is iridium.
2003 Chevrolet Tahoe 5.3L 323CID V8 GAS FI T - GAP=0.040"; Original equipment is iridium.
2003 Chevrolet Tahoe 4.8L 294CID V8 GAS FI V - GAP=0.040"; Original equipment is iridium.
2004 Chevrolet Tahoe 5.3L 323CID V8 FLEX FI Z - GAP=0.040"; Original equipment is iridium.
2004 Chevrolet Tahoe 5.3L 323CID V8 GAS FI T - GAP=0.040"; Original equipment is iridium.
2004 Chevrolet Tahoe 4.8L 294CID V8 GAS FI V - GAP=0.040"; Original equipment is iridium.
2005 Chevrolet Tahoe LS 5.3L 323CID V8 FLEX FI Z - GAP=0.040"; Original equipment is iridium.
2005 Chevrolet Tahoe LS 5.3L 323CID V8 GAS FI T - GAP=0.040"; Original equipment is iridium.
2005 Chevrolet Tahoe LS 4.8L 294CID V8 GAS FI V - GAP=0.040"; Original equipment is iridium.
2005 Chevrolet Tahoe LT 5.3L 323CID V8 FLEX FI Z - GAP=0.040"; Original equipment is iridium.
2005 Chevrolet Tahoe LT 5.3L 323CID V8 GAS FI T - GAP=0.040"; Original equipment is iridium.
2005 Chevrolet Tahoe Z71 5.3L 323CID V8 FLEX FI Z - GAP=0.040"; Original equipment is iridium.
2005 Chevrolet Tahoe Z71 5.3L 323CID V8 GAS FI T - GAP=0.040"; Original equipment is iridium.
2006 Chevrolet Tahoe 5.3L 5328CC 325CID V8 FLEX FI Z L59 - GAP=0.040"; Original equipment is iridium.
2006 Chevrolet Tahoe 5.3L 325CID V8 GAS FI T - GAP=0.040"; Original equipment is iridium.
2006 Chevrolet Tahoe 4.8L 294CID V8 GAS FI V - GAP=0.040"; Original equipment is iridium.
2006 Chevrolet Tahoe LS 5.3L 5328CC 325CID V8 FLEX FI Z L59 - GAP=0.040"; Original equipment is iridium.
2006 Chevrolet Tahoe LS 5.3L 325CID V8 GAS FI T - GAP=0.040"; Original equipment is iridium.
2006 Chevrolet Tahoe LS 4.8L 294CID V8 GAS FI V - GAP=0.040"; Original equipment is iridium.
2006 Chevrolet Tahoe LT 5.3L 5328CC 325CID V8 FLEX FI Z L59 - GAP=0.040"; Original equipment is iridium.
2006 Chevrolet Tahoe LT 5.3L 325CID V8 GAS FI T - GAP=0.040"; Original equipment is iridium.
2006 Chevrolet Tahoe Z71 5.3L 5328CC 325CID V8 FLEX FI Z L59 - GAP=0.040"; Original equipment is iridium.
2006 Chevrolet Tahoe Z71 5.3L 325CID V8 GAS FI T - GAP=0.040"; Original equipment is iridium.
2007 Chevrolet Tahoe LS 4.8L 294CID V8 GAS FI C - GAP=0.040"; Original equipment is iridium.
2007 Chevrolet Tahoe LS 5.3L 5328CC 325CID V8 GAS FI J LY5 - GAP=0.040"; Original equipment is iridium.
2007 Chevrolet Tahoe LT 5.3L 5328CC 325CID V8 GAS FI J LY5 - GAP=0.040"; Original equipment is iridium.
2007 Chevrolet Tahoe LTZ 5.3L 5328CC 325CID V8 GAS FI J LY5 - GAP=0.040"; Original equipment is iridium
Hello there:
The recommended spark plug gap for a 2003-2004 Honda Odyssey is .044"
Keep in mind, many OE manufacturers (i.e. Denso, NGK) pre-gap their
plugs for specific applications. If you happen to buy the iridium or
platinum style plugs with the very thin center electrode, they should
come pre-gapped. It can't hurt to check the gap before installing
the plugs, but if any adjustment is necessary, do so with caution
because the ultra-thin electrode may crack if any excessive pressure is
placed on it.
Hope this is very helpful Best regards Michael
Check the wire harness on the transfer case to make sure it's still plugged in. Check the selector switch in the dash. Check the hub sensor wire harnesses on the front wheels. Check for error codes through OBD-II connector under the dash. Good luck.
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