2004 tahoe

[all power]

if i got the wrong page please help me... got a 04 tahoe with the 5.3 4x4 with 80,000 on her and only getting 13mpg...what can i do to get it around 16-17.. any tips or tricks will help

[old_master]

Things to check that are due shortly: AC Delco plugs, plug wires, fuel filter, air filter, oxygen sensors, check fuel pressure and leakdown, tire pressure, wheel alignment... all of these affect fuel mileage.

[j cAT]

Originally Posted by all power

if i got the wrong page please help me... got a 04 tahoe with the 5.3 4x4 with 80,000 on her and only getting 13mpg...what can i do to get it around 16-17.. any tips or tricks will help

the most to expect with a tahoe on the hwy only@ 70mph is 17mpg....

around town short trips 14 mpg is average ...

13 mpg is not that bad ...with plugs/air filter / maf cleaning with CRC MAF cleaner /also throttle body cleaning you should see better mpg and throttle response...

the upstream O2 sensors are in need of replacement at around 100,ooomi...though many go well beyond this mileage ..the risk is damage to the cat converters ...

measure the wire resistance to the plugs when changing and use dielectric grease on the boot ends...if they have never been replaced you will need a plug wire puller to get them off , or risk damaging the plug wires ...dielectric grease prevents core from damage..

only use ac delco plugs this engine is picky on plugs / delphi wires if needed ...

[all power]

could i change the the t-stat to a 180.get cooler runnin plugs.c.a.i,and change the pipes from single to dual and get rid of the cats or im in askin 4 more problems??????

[old_master]

Originally Posted by all power

could i change the the t-stat to a 180.get cooler runnin plugs.c.a.i,and change the pipes from single to dual and get rid of the cats or im in askin 4 more problems??????

Installing a colder thermostat will cause the ECM to richen up the injectors, decreasing fuel mileage. Colder plugs will foul, decreasing fuel mileage. Cold air intake is a total waste of money, unless you like the looks of them. Modifying the exhaust will do very little, if anything. Removing the converters: number one, it's illegal, number two, it will cause the SES light to come on. Basically yes, you're asking for problems. A good tune up using AC Delco parts is your best bet.

[j cAT]

Originally Posted by all power

could i change the the t-stat to a 180.get cooler runnin plugs.c.a.i,and change the pipes from single to dual and get rid of the cats or im in askin 4 more problems??????

where are you getting these crazy ideas ? this is one vehicle not to screw with ...the computer/pcm is very very picky ...any changes cause damage and more problems ...use the exact correct parts only ....or expect damage to your vehicle ..

[all power]

ok ther reason y i asked is because i used to have a 00 dodge 2500 and when i got it it was only getting 8mpg city...well i did some askin around and if i changed the pipes from single to dual/ cut the cat off/went to a 180 t-stat/cooler plugs/c.a.i....i went from 8 to 13 city...i didnt know if i could do the same to this motor...thank you guys