Truck won't start after pressure washing the engine bay please help

Asked by Apr 14, 2017 at 12:02 AM about the 1998 GMC Sierra 1500

Question type: Maintenance & Repair

I lightly pressure washed the engine bay of my
truck and ever since then the truck will crank but
not fire up.The truck ran flawless before this
happened.please help

4 Answers

10

It's possible a sensor has been affected because of the water seeping into the area where it connects with to a plug / terminal. I would give it a day to fully dry out, especially if you can let the sun shine on the engine bay. If it still wont start, make sure the connections didn't loosen and cause a weak connection. If you STILL have issues you may have to take it to a shop. In the future wrap any and all sensors, connectors etc.... with plastic and tape them of tight.

2 of 2 people found this helpful.

I unplugged the spark plugs and let it dry for about two days replaced the bad battery and today it fired up first crank.I warmed it up then drove it ten minutes and shut it off.Came back a few hours later It cranked but would not fire up.Do you have any other information on this? Thank you

No check engine lights or any others while I had it running. The engine is in great condition leaks no fliuds or anything of that nature everything is connected .

We believe it could possibly be the alternator or the starter.Mainly because the alternator did get sprayed once directly.Any thoughts?

Your Answer

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 11,532 nationwide Sierra 1500 listings starting at $399.

Postal Code:

GMC Sierra 1500 Experts

  • #1
    dragonflyoffshore
    Reputation
    5,450
  • #2
    John Saffrahn
    Reputation
    3,760
  • #3
    Glenn Clingenpeel
    Reputation
    3,450
View All

Related Models For Sale

Used Chevrolet Silverado 1500
184 Great Deals out of 11,614 listings starting at $1,700
Used Ford F-150
657 Great Deals out of 13,659 listings starting at $3,000
Used Toyota Tacoma
41 Great Deals out of 1,140 listings starting at $7,950
Used Dodge Ram 1500
52 Great Deals out of 503 listings starting at $3,488
Used Chevrolet Tahoe
7 Great Deals out of 808 listings starting at $3,995
Used Ford F-250 Super Duty
34 Great Deals out of 983 listings starting at $2,475
Used GMC Yukon
9 Great Deals out of 950 listings starting at $2,500
Used Chevrolet Camaro
921 listings starting at $12,000
Used Cadillac Escalade
3 Great Deals out of 494 listings starting at $4,980

Used Cars For Sale

2018 GMC Sierra 1500 For Sale
7,484 listings starting at $29,309
2017 GMC Sierra 1500 For Sale
16 Great Deals out of 1,917 listings starting at $399
2016 GMC Sierra 1500 For Sale
27 Great Deals out of 271 listings starting at $22,995
2015 GMC Sierra 1500 For Sale
68 Great Deals out of 583 listings starting at $20,998
2014 GMC Sierra 1500 For Sale
38 Great Deals out of 455 listings starting at $17,900

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.