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Forums
TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
Vortec 4.2L I-6
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1
02 Bravada dies on Interstate....Cause?
1968Case580CK
Nov 30, 2018
2
Replies
59
Views
7K
Jan 1, 2019
1968Case580CK
1
3 communication errors U1000, U1021, & U1045
Hatchet
Nov 12, 2013
2
Replies
59
Views
11K
Apr 23, 2014
Hatchet
Swapping in Ported Heads
Pittdawg
Oct 3, 2012
2
Replies
58
Views
8K
Dec 1, 2012
limequat
NEED HELP
Bad knocking
redline customs
Sep 19, 2016
2
Replies
58
Views
12K
Oct 7, 2016
littleblazer
Overheating after repairs (See details inside)
eXplicit
Jul 11, 2013
2
Replies
58
Views
4K
Oct 5, 2013
eXplicit
Coolant Flush
RTTBLT1
Apr 18, 2016
2
Replies
58
Views
8K
Jun 28, 2016
RTTBLT1
'05 GMC ENVOY TPS throttle issues
manoftheearth
Dec 21, 2022
2
Replies
57
Views
4K
Jan 18, 2023
manoftheearth
I
p1221 and tps issues
InsaneOctane
Jul 2, 2015
2
Replies
56
Views
9K
Jul 24, 2015
Mounce
M
seems like no fuel in open loop?
moneypit
Sep 11, 2013
2
Replies
56
Views
5K
Mar 8, 2014
moneypit
M
K
yet another lovely 4.2l valve tick
kickass audio
May 21, 2014
2
Replies
56
Views
31K
Jan 11, 2024
mrrsm
NEED HELP
Wont start after engine swap
dvs.dave.03ltz
May 16, 2018
2
Replies
56
Views
17K
Oct 3, 2018
dvs.dave.03ltz
B
Help!! Engine died!
BlackInk
Oct 7, 2013
2
Replies
55
Views
4K
Dec 15, 2014
Meiznac
M
SOLVED: Water pump on it's way out after just 6 months?
dkvasnicka
Apr 20, 2016
2
Replies
55
Views
5K
Jun 3, 2016
dkvasnicka
Locked
Truck took a few tries to start, now have knock/tapping noise?
Capote
Apr 23, 2018
2
Replies
55
Views
4K
Apr 29, 2018
Blckshdw
C
motor mounts
cmatb08
Jul 4, 2012
2
Replies
55
Views
12K
Mar 18, 2013
The_Roadie
No movement any gears
John Koda
Dec 9, 2020
2
Replies
55
Views
5K
Jun 2, 2021
John Koda
Very Slight Miss at Idle
Mooseman
Nov 11, 2018
2
Replies
55
Views
12K
Feb 23, 2019
Mooseman
SOLVED!
Low oil pressure 4.2L
Nvarela64
Aug 23, 2022
2
Replies
54
Views
10K
Jan 25, 2024
Mooseman
Oil Life Meter
triz
Mar 4, 2014
2
Replies
54
Views
4K
Mar 24, 2014
DanD
T
Exhaust Manifold Replacment - input requested
TequilaWarrior
May 27, 2020
2
Replies
54
Views
6K
Sep 24, 2020
02smartrak
Question
Opinions Wanted: Bypass OEM Transmission Cooler?
Blckshdw
Aug 27, 2019
2
Replies
54
Views
9K
Sep 7, 2019
littleblazer
NEED HELP
Engine stalling. No codes
yazan
Jun 24, 2019
2
Replies
53
Views
8K
Jul 12, 2019
Mooseman
T
Hesitation when accelerating from a dead stop
TobyP
Jan 26, 2023
2
Replies
53
Views
4K
Apr 17, 2023
TobyP
T
R
'06 engine ring/bearing/valve job
rchalmers3
Jul 25, 2020
2
Replies
53
Views
6K
Nov 24, 2020
rchalmers3
R
B
Engine replacement issues and fixes
billzie
Sep 29, 2017
2
Replies
52
Views
6K
Nov 22, 2017
m.mcmillen
J
Totally stumped on stumble - any gm master techs out there?
jbwi112
Aug 19, 2015
2
Replies
52
Views
10K
Sep 6, 2015
gmcman
A
car stalling when starting fix please
aboturky839
Jul 28, 2013
2
Replies
52
Views
3K
Aug 4, 2013
The_Roadie
NEED HELP
Best way to lock flywheel for harmonic balancer replacement.
Timber531
Jun 10, 2021
2
Replies
52
Views
7K
Aug 22, 2021
Mooseman
8
Tapping, knocking noise 02 TB 93k
81turboguy
Apr 8, 2013
2
Replies
52
Views
4K
Jun 24, 2013
CaptainXL
C
T
P0171 and P0303
thebat
May 16, 2017
2
Replies
52
Views
5K
Oct 24, 2017
thebat
T
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TrailBlazer, Envoy, 9-7x, Ascender, Rainer, & Bravada
Engine & Drivetrain
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