[Shop-talk] Improving truck performance

Mon Apr 3 12:18:00 MDT 2017

Sounds like the 5.3 is a pretty gutsy engine.  Just the pre-turbo mods 
would be plenty.

On 4/2/2017 7:50 PM, Mark wrote:
>
> This should do it! Maybe a little over kill but.... :)
>
> http://www.trucktrend.com/how-to/engine/1213tr-vortec-5-3l-big-bang/
>
> Mark
>
> Nashville
>
>
> On 4/2/2017 6:53 PM, Dave Cavanaugh wrote:
>> I have a 2004 GMC Sierra half ton, 2WD extended (not crew) cab.ï¿½ I 
>> believe it has a 5.3 Vortec engine, automatic transmission, unsure of 
>> the axle ratio. I'm the original owner, and it has about 74,000 miles 
>> on it.ï¿½ Other than the tires and radio, it is completely stock and 
>> is in generally very good shape.ï¿½ It fits my needs, and has been 
>> totally reliable to date, and I plan to keep it for the foreseeable 
>> future.ï¿½ï¿½ It also has a Leer fiberglass canopy on it right now, 
>> but it'll probably come off when I finish my move later this year.ï¿½ 
>> It's not my daily driver; I typically use it to pick up lumber, 
>> construction supplies and other routine truck duties.ï¿½ I typically 
>> don't do much towing, andï¿½ I have never been unhappy with the 
>> performance until last year when I started making multiple trips from 
>> Washington to Utah, usually towing an 8 to 12 foot UHaul trailer with 
>> my shop stuff in it.ï¿½ This trip includes several mountain passes 
>> and quite a bit of elevation change.ï¿½ The truck performs OK, but 
>> not great.
>>
>> I don't have a boat or RV, and I'm not trying to turn it into a one 
>> ton hauler; I would just like some suggestions as to possible mods I 
>> could have done to the engine to improve the performance and, if 
>> possible, improve the gas mileage.ï¿½ It generally gets about 16 MPG 
>> on these trips.ï¿½ Any ideas?
>
>
>
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