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Forums
TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Repairs, tuning, modifications, & maintenance.
Vortec 4.2L I-6
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R
Only 3000 miles on oil, but One year old. Change filter too?
Yesterday at 4:41 PM
Redbeard
Drivetrain
New
1.1K
13.3K
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1.1K
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13.3K
NEED HELP
Tranny slipping and surging. 4WD switch flashing
Apr 4, 2024
filthyfingers
Vortec 5.3L V8
New
393
5.2K
Threads
393
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5.2K
Rate this Used Airfilter
Yesterday at 12:20 PM
christo829
LS2 6.0L V8
40
839
Threads
40
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839
H
Cylinder 6 Misfire Mystery
Nov 20, 2023
highlander
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NEED HELP
P0171 on my 04 Trailblazer LT won't go away
ghost_leader07
Sep 24, 2021
2
3
Replies
117
Views
8K
Nov 6, 2023
mrrsm
NEED HELP
Fan Clutch from hell lol
Aec678
Aug 30, 2020
2
Replies
58
Views
5K
Sep 13, 2020
TJBaker57
NEED HELP
Flex plate cracked: do I need to pull transmission?
HizAndHerz
Apr 14, 2017
2
Replies
51
Views
15K
Jun 24, 2017
HizAndHerz
NEED HELP
High Negative LTFT / Poor Gas Mileage
2advanced
May 27, 2019
2
Replies
51
Views
11K
Aug 8, 2019
Tankcruiser
NEED HELP
Overheating issue with AC ON!
ghost_leader07
Aug 17, 2022
2
Replies
49
Views
3K
Aug 23, 2022
ghost_leader07
NEED HELP
TB EXT dropping out of gear, overheating
Charles Austin Miller
Jul 17, 2017
2
Replies
40
Views
3K
Jul 26, 2017
jsheahawk
NEED HELP
Stick Dipstick!
l008com
Jul 24, 2019
Replies
38
Views
6K
Dec 7, 2022
Mooseman
R
NEED HELP
06 Trailblazer EXT 4.2 Engine swap
Rick
Nov 8, 2021
Replies
30
Views
4K
Jan 10, 2022
NJTB
N
NEED HELP
Exhaust drone
hawkeye405
Jan 4, 2019
Replies
29
Views
6K
Jan 17, 2019
hawkeye405
NEED HELP
Possible bad fuel pump (confirmation needed)
ghost_leader07
Nov 8, 2023
Replies
28
Views
971
Nov 14, 2023
mrrsm
S
NEED HELP
4x4 Working strange
Sn1perdeath
Aug 27, 2021
Replies
25
Views
2K
Sep 10, 2021
chris68369
C
C
NEED HELP
Stalled
cretecrawler
May 26, 2019
Replies
25
Views
3K
Jun 8, 2019
cretecrawler
C
NEED HELP
03 sounds like its "dieseling"
redline customs
Aug 30, 2016
Replies
22
Views
5K
Sep 2, 2016
mrrsm
V
NEED HELP
Doesn’t stay running when cold
Voy07
Dec 20, 2020
Replies
20
Views
2K
Dec 24, 2020
Voy07
V
R
NEED HELP
Annoying chirp under hood
richphotos
Apr 19, 2020
Replies
19
Views
3K
Apr 25, 2020
richphotos
R
NEED HELP
Ac Compressor clutch not engaging
eutechnyx
Aug 15, 2017
Replies
19
Views
6K
Aug 22, 2017
jsheahawk
NEED HELP
Replacing LH bearing in front diff, have questions.
gmcman
Mar 7, 2021
Replies
19
Views
2K
Mar 19, 2021
gmcman
H
NEED HELP
Trailblazer Overheating / Coolant
Hoop1101
Nov 21, 2016
Replies
19
Views
18K
Dec 12, 2016
mrrsm
L
NEED HELP
Transmission problems (tcc, shifting)
Leukay
Jul 17, 2017
Replies
18
Views
4K
Sep 27, 2017
seanpooh
C
NEED HELP
Starter only clicks
cretecrawler
Mar 21, 2021
Replies
18
Views
2K
Mar 23, 2021
cretecrawler
C
G
NEED HELP
Runs drives fine cold warms up and stalls no restart
Gogo5o
Nov 5, 2019
Replies
17
Views
3K
Nov 15, 2019
Maverick6587
NEED HELP
P0651
psa55
Jun 7, 2020
Replies
17
Views
4K
Jul 14, 2022
mrrsm
NEED HELP
Persistent P2138 And Reduced Engine Power
UsernameIsTaken
Aug 27, 2019
Replies
17
Views
4K
Sep 1, 2019
UsernameIsTaken
D
NEED HELP
Rear Differential identification and possible rebuild!!
darknight76
Aug 16, 2017
Replies
16
Views
5K
Sep 25, 2017
darknight76
D
NEED HELP
Recommended Exhaust Manifold Replacement?
MrShelley
Oct 14, 2021
Replies
15
Views
2K
Jan 30, 2022
Schurkey
NEED HELP
DEXRON VI Mixed with Nasty Old DEXRON III?
SLiNv_Vic
Apr 10, 2016
Replies
15
Views
17K
Jun 21, 2016
mrrsm
NEED HELP
2006 TrailBlazer "Crank no start"
Mikefred7370
Aug 18, 2018
Replies
14
Views
2K
Aug 19, 2018
Mikefred7370
NEED HELP
Shifter locked in neutral
Drec
Jul 28, 2022
Replies
14
Views
1K
Aug 2, 2022
Drec
G
NEED HELP
2002 Envoy will not move till 1500rpm...and other stuff.
gmanfive0
May 8, 2016
Replies
13
Views
2K
May 18, 2016
shovenose
G
NEED HELP
Service Brakes, tranny slipping, spedo jumping, A/C drive hot:pass cold! No problem lights!?
GoldRainier
Aug 31, 2019
Replies
12
Views
1K
Sep 25, 2019
GoldRainier
G
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