The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain > LSx Swaps

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 09-01-2021, 12:01 PM   #1
Arnulfo
Registered User
 
Join Date: Aug 2015
Location: Los angeles
Posts: 159
2003 LQ9 in 1997 silverado

Greetings, looking to get some info on how difficult this swap would be. Thanks
Arnulfo is offline   Reply With Quote
Old 09-02-2021, 07:51 AM   #2
biketopia
Senior Member
 
Join Date: Jul 2015
Location: Warrenton VA
Posts: 1,001
Re: 2003 LQ9 in 1997 silverado

Need more info, what are your goals with the truck, is the 97 a v8 already, are you doing the work yourself, are you mechanically inclined, are you paying a shop to do the work? Swapping the engine is relatively straight forward, but what trans are you using, 2wd or 4wd, using a stock ECM to run it or going aftermarket.
__________________
71 c-10 Long Bed, under the knife for a No Limit Engineering Wide Ride Chassis Pack and coil over static drop.

07 Silverado Classic 2wd

95 Camaro 427SBC/TH350
biketopia is offline   Reply With Quote
Old 09-02-2021, 08:12 AM   #3
mongocanfly
Post Whore

 
mongocanfly's Avatar
 
Join Date: May 2015
Location: Alabama
Posts: 14,557
Re: 2003 LQ9 in 1997 silverado

I did my 1st LS swap into my 81..I was amazed at how straightforward it was ..using Ebay adapter plates, everything just fell into place..the biggest hurdle I had to deal with was exhaust..mine has a nv4500 behind it with mech linkage..trying to get around all that was a pain..
Like biketopia stated , some more info on your swap would help..
Youd be best to use the trans that comes with the LQ9..
Its gonna be dbw so you'll need the pedal and tac module..or swap it to dbc..that's what I did to mine
For wiring I took one look at the factory harness ,and then I called PSI for a harness..dont regret that..
The pump may also be setup for hydroboost...no bid deal there as you can cap off the unused return port..or swap your vacuum to hydroboost....
The ecm will need a home..I'm betting you dont have from under the dash for it.under hood may be your only choice..
I've seen several of the gmt400 trucks with LS swaps at car shows..the engines look right at home in there..
__________________
Mongo...aka Greg

RIP Dad
RIP Jesse

1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
2023 Chevy Z71..daily driver
mongocanfly is offline   Reply With Quote
Old 09-02-2021, 01:31 PM   #4
Arnulfo
Registered User
 
Join Date: Aug 2015
Location: Los angeles
Posts: 159
Re: 2003 LQ9 in 1997 silverado

1997 silverado with a v8 305 i think throttle body fuel injection drive by wire, auto transmission, 2 wheel drive. I will do work myself. Replacement 6.0 came out of a 2003 denali, has fan clutch,drive by wire and came with computer and harness. Original motor has a dead cylinder and guttless.
Arnulfo is offline   Reply With Quote
Old 09-02-2021, 02:42 PM   #5
biketopia
Senior Member
 
Join Date: Jul 2015
Location: Warrenton VA
Posts: 1,001
Re: 2003 LQ9 in 1997 silverado

The current Silverado is a drive by cable, and the donor is drive by wire, so you either need to get the pedal and TAC module to go with it, or convert it to drive by cable with a different throttle body. Grab some adapter motor mounts and it will bolt right in, clutch fan might line up with the shroud you have now but you can probably make the denali radiator and shroud work too if you have it. I would use a 4l60e or 4l80e from the donor vs the one that's currently in the truck. It can most likely be used but will need need the correct flex plate and possibly spacers to make the converter bolt up, and then you need to be able to control it with the stock ecm if its an electric unit. If it's a 700r4 it's about not worth trying to get a TV cable to actuate correctly.
__________________
71 c-10 Long Bed, under the knife for a No Limit Engineering Wide Ride Chassis Pack and coil over static drop.

07 Silverado Classic 2wd

95 Camaro 427SBC/TH350
biketopia is offline   Reply With Quote
Old 09-02-2021, 03:16 PM   #6
Arnulfo
Registered User
 
Join Date: Aug 2015
Location: Los angeles
Posts: 159
Re: 2003 LQ9 in 1997 silverado

Thanks for the help. This truck is a thrasher work truck so dont want to go through all that with the transmission. Was hoping motor and tranny would bolt right up. Think i will just go with a new crate 350 non ls motor like the one in it now.
Arnulfo is offline   Reply With Quote
Old 09-03-2021, 06:23 AM   #7
biketopia
Senior Member
 
Join Date: Jul 2015
Location: Warrenton VA
Posts: 1,001
Re: 2003 LQ9 in 1997 silverado

It can certainly work, just might not be as plug and play. The spacers and adapters are all readily available and cheap.
__________________
71 c-10 Long Bed, under the knife for a No Limit Engineering Wide Ride Chassis Pack and coil over static drop.

07 Silverado Classic 2wd

95 Camaro 427SBC/TH350
biketopia is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:37 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com