why does my truck lose power shortly after driving in rain?

Asked by May 26, 2015 at 06:49 PM about the 2001 GMC Sierra 1500 SLT 4WD Extended Cab SB

Question type: Maintenance & Repair

When I scan I get code indicating #6 cylinder misfire. I recently replaced spark plug wires but it still does it. I look for any sign of moisture near plug and coil but they are dry. The truck has aprox. 175000 miles and runs great when on dry road.

3 Answers

Lol I have an explorer every time I drive in the rain the lights blow out

5

You might have a Crack in the cylinder which would allow water in which could be why it misfires

72,395

Wait until it gets dark and raise the hood. Start the engine and use a spray bottle to mist the area with water. You'll probably see it start sparking and the truck will begin to misfire. Could be a hairline crack in the spark plug or a plug wire not properly seated. When a vehicle is susceptible to moisture it's going to be an ignition system problem 99% of the time. HTH. -Jim

Your Answer

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 64,172 nationwide Sierra 1500 listings starting at $999.

ZIP:

GMC Sierra 1500 Experts

  • #1
    dragonflyoffshore
    Reputation
    5,450
  • #2
    John Saffrahn
    Reputation
    3,780
  • #3
    Glenn Clingenpeel
    Reputation
    3,470
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,576 Great Deals out of 173,147 listings starting at $955
Used Ford F-150
3,129 Great Deals out of 218,985 listings starting at $1,200
Used GMC Sierra 2500HD
110 Great Deals out of 14,095 listings starting at $2,799
Used Toyota Tundra
673 Great Deals out of 34,144 listings starting at $1,500
Used Chevrolet Silverado 2500HD
378 Great Deals out of 30,269 listings starting at $2,995
Used Dodge Ram 1500
423 Great Deals out of 11,095 listings starting at $2,000
Used Toyota Tacoma
676 Great Deals out of 45,000 listings starting at $1,000
Used Ford F-250 Super Duty
392 Great Deals out of 48,572 listings starting at $1,899
Used GMC Yukon
582 Great Deals out of 20,667 listings starting at $2,695
Used Chevrolet Tahoe
801 Great Deals out of 41,544 listings starting at $1,987
Used Cadillac Escalade
249 Great Deals out of 11,859 listings starting at $1,200
Used Chevrolet Camaro
426 Great Deals out of 31,242 listings starting at $1,450

Used Cars For Sale

2018 GMC Sierra 1500 For Sale
25,602 listings starting at $24,499
2017 GMC Sierra 1500 For Sale
71 Great Deals out of 11,355 listings starting at $20,369
2016 GMC Sierra 1500 For Sale
166 Great Deals out of 4,046 listings starting at $16,404
2015 GMC Sierra 1500 For Sale
202 Great Deals out of 5,540 listings starting at $14,995
2014 GMC Sierra 1500 For Sale
197 Great Deals out of 4,897 listings starting at $9,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.