Mods on intakes, dual exaust and trans cooler

Asked by Chrisb Mar 25, 2010 at 12:59 PM about the 2003 GMC Sierra 1500HD 4 Dr SLE Crew Cab SB HD

Question type: Car Customization

This is a good truck with plenty of power.  I know I can’t get much better that 14MPG, but I need some advice on mods.  I’d like to add a good intake for more air, dual exhaust and is the trans cooler within the radiator?  I want to know if it would benefit to add an after-market Trans and oil cooler or is the stock system sufficient.  I’d like you to give me part numbers for the intake and exhaust if you can.  I appreciate any input.    

Macon Ga.

2 Answers

roughneck answered 13 years ago

I have the exact same truck. Bought it in 04 and have been gradually adding mods since. I have a airaid cai, bbk throttle body, custom dual exhaust, and a hypertech power programmer 3. I can honestly say that each of these mods had minimal affect on the trucks performance.

Mark helpful

roughneck answered 13 years ago

I also do a LOT of towing and have never had a problem with overheating, including the trany. The only time i have had an issue is when driving long distance at highway speed with a plow. I have been tossing around the idea of a e-fan to maybe solve this problem, and to get a little more low end hp and torque.

Mark helpful

Your Answer:

Related Questions

Shortcuts

Search GMC Sierra 1500HD Questions

CarGurus Experts

  • #1
    sg73
    Reputation
    50
  • #2
    schalk diedericks
    Reputation
    40
  • #2
    TransAm77
    Reputation
    40
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used GMC Sierra 1500
138 Great Deals out of 7,122 listings starting at $1,888
Used Chevrolet Silverado 1500
225 Great Deals out of 5,832 listings starting at $2,975
Used GMC Sierra 2500HD
22 Great Deals out of 1,628 listings starting at $8,999
Used Ford F-150
322 Great Deals out of 15,212 listings starting at $1,712
Used Dodge RAM 1500
8 Great Deals out of 74 listings starting at $4,000
Used GMC Sierra 2500
2 listings
Used Chevrolet Silverado 2500HD
27 Great Deals out of 1,306 listings starting at $9,990
Used Toyota Tundra
38 Great Deals out of 1,239 listings starting at $943
Used Ford F-250 Super Duty
27 Great Deals out of 1,192 listings starting at $7,995
Used Dodge RAM 2500
24 listings starting at $7,995

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. Content will be removed if CarGurus becomes aware that it violates our policies.