Officially Swapping in a 6.0/2wd 4L80e into my 99 OBS Escahoe - GET DA WATER

[Mickeymotormount]

I used the original harness supplied with the 6.0. Modified it for my truck. I retained the A/C and cruise control. I'm sure your vehicle will be different with all it's accessories and difference in year from mine. It took some work but I felt it was worth it. It gave me a better understanding of the entire electrical system.

[foreverfalcon40]

Ok, So finally after almost a year Lextech is finally sending me a pre-programmed 411 as well as A/C Bracket kit. Here is a link to all the info on it (http://www.ls1truck.com/forums/lsx-t...acket-kit.html) I wish Lextech was closer so he can do a live tune, but his pre-tuned 411 will help get the truck started and hopefully run smooth enough for me to take it to ForceFedEngineering (http://www.fferacing.com) to get it Dyno Tuned.

I needed my gear ratio and I was not sure so I finally looked up my RPO code and this website was the besthttp://<a href="http://LonestarThund...hunder.com</a>

This

Translated into
This
AG2
ADJUSTER PASS ST POWER, MULTI-DIRECTIONAL
AG9
ADJUSTER FRT ST POWER, 6 WAY
AJ1
WINDOW TINTED DEEP, ALL EXCEPT W/S AND DRS
AM7
SEAT RR FOLDING
AU0
LOCK CONTROL, ENTRY REMOTE ENTRY
AU3
LOCK CONTROL SIDE DR, ELEC
AXP
VIN IDENT POSITION, MULTI-PURPOSE VEHICLE
A31
WINDOW POWER OPERATED, ALL DOORS
A95
SEAT FRT BKT, HIGH BACK, DRIVER & PASS RECL
BVE
STEPS RUNNINGBOARD, SIDE
B34
COVERING FRT FLOOR MATS, CARPETED INSERT
B35
COVERING REAR FLOOR MATS, CARPETED INSERT
B39
COVERING FLOOR CARPET, LOAD FLOOR
B85
MOLDING B/S EXTERIOR, BRIGHT
B96
MOLDING WHL OPENING
C49
DEFOGGER RR WINDOW, ELECTRIC
C5U
GVW RATING 6,800 LBS
C60
HVAC SYSTEM AIR CONDITIONER FRT, MAN CONTROLS
C69
HVAC SYSTEM RR AIR CONDITIONER
DD0
MIRROR O/S LH & RH, REMOTE CONTROL, ELECTRIC, HEATED, LT SENSITIVE
DF5
MIRROR I/S R/V LT SENSITIVE, COMPASS, O/S TEMP DISPLAY
DK6
CONSOLE ROOF INTERIOR
D55
CONSOLE FRT COMPT, FLOOR
EVA
TEST DVT, EVAP EMISSION REQUIREMENT
FG5
SHOCK ABSORBERS FRT & RR, GAS PRELOADED, DELCO/BILSTEIN, 46MM
FK2
ARM LH TORS BAR SPRING ADJ (A)
FK3
ARM RH TORS BAR SPRING ADJ (B)
GU6
AXLE REAR 3.42 RATIO
JAN
PLANT CODE JANESVILLE, WI, USA
JB6
BRAKE POWER, DISC/DRUM, 7,200 LBS
KA1
HEATER SEAT, FRT
KG9
GENERATOR 140 AMP
K34
CRUISE CONTROL AUTOMATIC, ELECTRONIC
L31
ENGINE GAS, 8 CYL, 5.7L, CPI
M30
TRANSMISSION AUTO 4 SPD, HMD, 4L60-E, ELECTRONIC
NA1
EMISSION SYSTEM GVW LESS THAN 8,500 LB
NF2
EMISSION SYSTEM FEDERAL, TIER 1
NG1
CERTIFICATION EMISSION, GEOGRAPHICALLY RESTRICTED REGISTRATION FOR VEHICLES UP TO 6,000 LBS GVW
NP5
STEERING WHEEL LEATHER WRAPPED
NP8
TRANSFER CASE ACTIVE, TWO SPEED, PUSH BUTTON CONTROL
N33
STEERING COLUMN TILT TYPE
PF4
WHEEL
QGA
TIRE ALL P245/75R16-109S BW R/PE ST TL AT
SLM
SALES PROCESSING STOCK ORDERS
YD3
AXLE (BASE EQUIP) FOR SCHEDULING GVW PLATE
YD6
SPRING RR, BASE EQUIPMENT
YE9
CONVENIENCE PKG COMFORT & DECOR LEVEL #3
YGA
TIRE REAR P245/75R16-109S BW R/PE ST TL AT
ZGA
TIRE SPARE P245/75R16-109S BW R/PE ST TL AT
ZM9
SALES PACKAGE COMFORT & CONVENIENCE
ZQ3
SALES PACKAGE DRIVER CONVENIENCE II
ZW9
BODY EQUIPMENT BASE BODY OR CHASSIS
ZY2
COLOR COMBINATION TWO TONE
1SC
PACKAGE OPTION 03
1SZ
DISCOUNT OPTION PACKAGE

So I have 3.42's from the factory. Also needed to know exactly what injectors I am using for the tables and 8.1 Marine Injectors by Delphi Model#17113739.

I picked up the injector's used also the seller got me (I think) in a vulnerable spot) Said he had modified fuel rails (welded AN fitting) help with the swap so for few extra bucks I got them as well. Figure just put less stress on my buddy who is helping me with the swap. I am stuck in a rut with the swap as it comes to getting the Fuel System squared away. Not sure if my Tahoe is return or returnless and same is for my 6.0.

What do I need to order or fabricate to help get fuel to the motor?

Here are the links to the fuel rail

[foreverfalcon40]

I am personally leaning towards using the 411 with the additional wires for simplicity. If I can't get the wires to look nice and neat then I will go the other route. For now my heart is in re-using the stock harness and making it nice and neat!

[foreverfalcon40]

How are you guys getting fuel to the LS motor? Am I on the right path with the AN Fitting welded to the rail...need to use a stock one. Some people run a corvette fuel filter and some do not.

I have a 99 OBS Tahoe...what do I need to get this thing fueled before my fiancee finds out I have money set aside and she puts it towards the wedding.

[capricefrk013]

How are you guys getting fuel to the LS motor? Am I on the right path with the AN Fitting welded to the rail...need to use a stock one. Some people run a corvette fuel filter and some do not.

I have a 99 OBS Tahoe...what do I need to get this thing fueled before my fiancee finds out I have money set aside and she puts it towards the wedding.

The Corvette filter is for the single fed line to the pre obdII motors. If I remember correctly. Yours should have 2 lines. A feed and return. from what I gather there are fittings that attach to the furl rail lines and will snap into the the lines in the firewall. Maybe with some fuel injection rubber lines for the flexibility.

This is from a thread on here.....

Update

EAR-9894DBHERL
Earl's Performance 9894DBHERL - Earl's Performance AN to Metric Adapter Fittings $8.95 x 1

EAR-9894DBJERL
Earl's Performance 9894DBJERL - Earl's Performance AN to Metric Adapter Fittings $8.95 x 1

RUS-640850
Russell Performance 640850 - Russell Fuel Rail Fitting Adapters
$15.95 x 1

RUS-640860
Russell Performance 640860 - Russell Fuel Rail Fitting Adapters
$14.95 x 1

SUM-220690
Summit Racing SUM-220690 - Summit Racing® Hose Ends

$4.88 x 1

SUM-240606B
Summit Racing SUM-240606B - Summit Racing® Braided Nylon Hose
$31.95 x 1

Part Subtotal $100.27

Delivery $12

Total $112

Fuel line stuff came. Got to wait til I drop in the engine before I cut them to length.

[foreverfalcon40]

The Corvette filter is for the single fed line to the pre obdII motors. If I remember correctly. Yours should have 2 lines. A feed and return. from what I gather there are fittings that attach to the furl rail lines and will snap into the the lines in the firewall. Maybe with some fuel injection rubber lines for the flexibility.

This is from a thread on here.....

THANKS FOR YOUR RESPONSE...I saw that as well...but on MYZTERRAY build thread which is a 96 ( I am up to page 21 he has ordered parts for the vette filter and his truck is OBD 2 as well) I can not Copy and Paste since I am at work on the 11th page of thread he talks about getting the parts.

[kewljay223]

How are you guys getting fuel to the LS motor? Am I on the right path with the AN Fitting welded to the rail...need to use a stock one. Some people run a corvette fuel filter and some do not.

I have a 99 OBS Tahoe...what do I need to get this thing fueled before my fiancee finds out I have money set aside and she puts it towards the wedding.

It depends on what type of fuel rail you have. do you have a return type or returnless type? i wish i took pics the other day of my finished settup but i forgot so i cant post any. but just look at your rail. if you have two lines headed toward the back, one bigger than the other than you have a return type. if you only have one, its returnless. the guy hacked yours up so you may not have what im talking about anymore. how many an fittings do you have? that should tell you.

anyway, most people convert to an so you can skip a couple parts. if you have returnless, thats when youll need the corvette filter. it has an IN and RETURN on one side and the other goes to the fuel rail. here is a diagram that i found with the required parts/numbers/and shows how they are connected. you will probably not use some of this stuff depending on hows yours is set up. i bought all these parts and it worked like a charm.

[foreverfalcon40]

Thanks...Well I have two sets of fuel rails...one that is currently on the motor out 00 Chevy 2500 HD and the modified ones...

It might be hard to tell about the HD one de to the pics I took of them...motor assembled. I will look at the "modified" fuel rails later tonight. Chime in and post better pics. The "modified" fuel rail has one AN fitting welded to one rail.

[Mickeymotormount]

I used high pressure fuel injection hose and the appropriate clamps. I also used a double flare tool to put a bulge on the fuel lines so the hose wouldn't slip off. I simply cut off the fittings and bulged the ends of the lines. I'm also running the standard fuel filter. My truck originally had TBI but after checking part numbers, the filters are the same from the TBI to Vortec injected small blocks.

If you have the original fuel pump for the Vortec injected traditional small block, that is able to supply the needed pressure to get the LS engine up and running.

[kewljay223]

aha! found a pic i took of the feed and return lines when i first got my motor. the upper is the feed and the lower is the return. not the greatest pic but thought i might help to have something to compare to



and yes, in case anyone notices, that is a seatbelt being used to hoist it around. thats how the JY carried it to my truck with a forklift... lol. goes to show you how strong they are... lol