Engine Tunes/Mods | Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum

02 Fuel pump not 'humming' when ignition is turned on

2 3

42

1K

by mikejenner972

HELP! P0300 after engine swap

4

729

Gas Mileage improvements!!

2 3 4

73

44K

by Ravalli Surfer

Rough shut down

11

1K

05 Trailblazer I6 engine oil leak

1

576

[SOLVED] Envoy falls on its face.

18

3K

Swap 08 2WD Body to 08 4WD Frame

0

115

Swapping out 4.2 for 4.2 and gears question

0

193

by BlueC7

Another p0171 thread

1

146

another P0300 thread

5

302

by Ravalli Surfer

DTC P0300 Random Misfire

2

26

52K

0

287

Fuel smell when parked in garage

1

602

After market motor mounts

1

625

What weight oil do you use?

15

90K

Can any tuner with efi live tune P10 PCM for turbo?

3

2K

trailblazer LS 5.3 to lq4 swap

2

2K

Valve cover gasket job?

6

4K

16

3K

4.2 6 engine issues ??

0

598

4

722

by dh4645

Engine Knocking or Noise

1

839

by LSXHP

2

1K

by B_rock

Clutch and codes?

11

2K

More horsepower

6

2K

by Linusridesred

flex fans...will they work on our trucks?

3

2K

2004 Envoy 4.2 Lack of power while warming up and..

2

509

Front lower engine oil leak?

4

4K

Fuel Filter Question

1

393

by EnvoyBoy2004

I6 to 6.7L LQ4 with standalone fuel/spark?

3

999

0

374

still overheating

11

2K

2006 envoy rod bearings

0

298

by Jdiggitydogg1

Range AFM vs Diablo Sport S1000 AFM Disabler

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323

Strange idle after hard drive? Anyone had this before?

5

702

by EnvoyBoy2004