i have a 2003 gmc truck 6.6 diesil and it wont start when it is cold .

Asked by Jan 29, 2014 at 08:29 PM about the 2003 Chevrolet Silverado 2500HD 2 Dr LS Standard Cab LB HD

Question type: Maintenance & Repair

i have changed the glow plugs,condutor rial,glow plug actuator,fuelfilter.what could be the problem.

1 Answer

12,495

The big boys that drive the 18 wheelers have what's called a fuel heater that circulates the gas through a radiator type heater to keep the fuel warm. Paraffin wax in in the diesel fuel and it will clog up the injectors. If you are in cold weather, find a way to keep the fuel in the tank warm. This may help. Have the injectors cleaned and the fuel line blown out to clear it. There is an additive you can add to the diesel fuel to help this. Also, if there is a leak in the injection system and air is getting in, it will cause a starting problem as fuel is not getting into the cylinders. You may be going to a truck repair place to trouble shoot this problem.

Your Answer

Add photo

Related Questions

  • Truck wont shift into reverse after warming up but will go into reverse if engines cold 1 answer

    I just installed a rebuilt transmission into a 2008 GMC SIERRA, it shifts fine when first started but after it warms it won't go in reverse.

    2008 Chevrolet Silverado 2500HD LT1 Crew Cab 4WD

    -

    Maintenance & Repair

  • MY 2002 GMC 2500HD DIESEL WONT START. IT TURNS OVER BUT WILL NOT START 1 answer

    LIVE IN CARSON CITY, NV. AND IT IS VERY COLD. DIDNT START MY TRUCK FOR 3 DAY AND WENT OUT TO START IT ON THE THIRD MORNING AND IT WOULDNT START. I HAVE SINCE FOUND THE PLUG FOR THE BLOCK HEATER AND ...

    2002 Chevrolet Silverado 2500HD

    -

    Maintenance & Repair

  • Starting problem in cold weather? 6 answers

    I have 03 Silverado HD. I'm having a hard time starting my truck in cold weather. When I start my truck it runs fine for around 4-5 minutes, than it starts missing and sometimes stalls. When I get the...

    2003 Chevrolet Silverado 2500HD 4 Dr LT 4WD Crew Cab SB HD

    -

    Maintenance & Repair

  • cold start up high pitch squealing noise from engine 3 answers

    on cold days especially when I start the truck it will squeal with accordance to the engine, when I speed up the squeal gets higher pitched. after my truck heats up to its regular temp the noise wil...

    2002 Chevrolet Silverado 2500HD 4 Dr STD Extended Cab SB HD

    -

    Maintenance & Repair

  • Diesel or Gas? 37 answers

    im looking to buy a Chevy 2500HD, i will be using it for work over the summer, landscaping and hauling and towing, and putting a plow on for the winter next year, and im stuck on whether or not to b...

    Chevrolet Silverado 2500HD

    -

    General

Search Chevrolet Silverado 2500HD Questions

Chevrolet Silverado 2500HD Experts

#1 Steven Loeffler
Steven Loeffler
Reputation 440
#2 FordNut
FordNut
Reputation 280
#3 Tom Demyan
Tom Demyan
Reputation 270
View All

Related Models For Sale

Used GMC Sierra 2500HD
143 Great Deals out of 14,008 listings starting at $2,650
Used Ford F-250 Super Duty
397 Great Deals out of 47,819 listings starting at $400
Used Chevrolet Silverado 1500
2,061 Great Deals out of 159,888 listings starting at $999
Used Dodge Ram 2500
141 Great Deals out of 5,300 listings starting at $2,500
Used GMC Sierra 1500
903 Great Deals out of 64,759 listings starting at $1,500
Used Chevrolet Silverado 2500
8 Great Deals out of 303 listings starting at $3,995
Used Ford F-150
2,453 Great Deals out of 210,800 listings starting at $895
Used Ford F-350 Super Duty
380 Great Deals out of 27,284 listings starting at $2,495
Used Chevrolet Silverado 1500HD
20 Great Deals out of 279 listings starting at $3,800
Used Toyota Tundra
543 Great Deals out of 32,355 listings starting at $2,995
Used Chevrolet Silverado 3500
20 Great Deals out of 598 listings starting at $5,995

Used Cars For Sale

2017 Chevrolet Silverado 2500HD For Sale
13,095 listings starting at $25,178
2016 Chevrolet Silverado 2500HD For Sale
26 Great Deals out of 3,197 listings starting at $24,900
2015 Chevrolet Silverado 2500HD For Sale
44 Great Deals out of 2,055 listings starting at $19,500
2014 Chevrolet Silverado 2500HD For Sale
17 Great Deals out of 582 listings starting at $11,041
2013 Chevrolet Silverado 2500HD For Sale
9 Great Deals out of 1,000 listings starting at $7,200