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5.3L N 2 2004 2dr Blazer Ls Updated 01/10/2023

19628 Views 154 Replies 18 Participants Last post by  PeteD
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Update.01/10/2023
2004 Chevy Blazer Ls 2dr
. I am putting a 5.3L (L59) from a 03 GMC Yukon drive by wire with the summit racing Pistons Chevy performance head gaskets and 243 heads Mill down to 62 CC my compression will be 10.6.1 CR. Should work well with the 2004 LS6 Corvette camshaft I'm going to be using. And a 2006 4L60E C/N 6CPD C-Police Truck transmission from a retired NYPD fleet Chevrolet Tahoe.

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Parts list.
5.3L L59 from 2003 GMC Yukon SLT.
159K Miles on it when pulled.
New GM Performance Camshaft from 2004 LS6 Corvette P/N 12565308.
Gen 3 243 64cc Heads milled down to 62cc.
DELPHI 12613412 50lb Ev6 injectors.
Chevrolet Performance Head Gaskets -12575329 Compressed Thickness 0.052 in.
Chevrolet performance valve springs P/N 19420455.
Brian Tooley Racing Rocker Arm Trunnion Upgrade Kit BTRTK001NB.
Gen IV Rods P/N 19209286.
ARP 134-3609 Performance Series Cylinder Head Bolt Kit.
ARP 134-6006 Connecting Rod Stud Kit.
Current performance Motor mounts & Blazer 2WD transmission crossmember RCS10B-700 .
GM 302-1 muscle oil pan
GM PERFORMANCE Dipstick Tube P/N 12570787
GM PERFORMANCE Dipstick P/N 12570788
Holly Blackheart
exhaust manifold P/N 7122 30 26 HKR.
2006 C/N 6CPD C-Police Truck 4L60e transmission from a retired NYPD fleet Chevrolet Tahoe with TransGo shift kit HD-GM92 TMBX torque converter for now.
Also with Sonnax heavy duty 3-4 clutch plate kit with 7 clutch pack I'm using Raybestos GPZ105 clutch set and upgraded to AC-Delco P/N (24241244) rear heavy duty 5 - pinion planetary and I order a Sonnax 77284-K front six pinion planetary it will change first and second gear ratio. First Gear Ratio: 2.84: 1, Second Gear Ratio: 1.55:1.

Holly Blackhart AC evaporator side cover P/N 71223028HKR.
Speedway motors 4130 chromoly steel Upper Control Arm P/N 91605012
LS1 Camaro / GTO water pump with LS1 Camaro / GTO harmonic balancer. With modified alternator / power steering bracket to line up with GTO harmonic balancer and water pump.
Melling M295HV High Volume Oil Pump with 60 PSI spring.
Melling BD417-DBRKT - Melling Timing Chain Dampener Bracket
Dirty Dingo DD-LS-AC-LM-CMV lower passenger side mount A/C bracket kit with Sanden SD7B10 mini compressor.
Quantum-340lph-direct-drop-in-performance-fuel-pump-assembly for 2dr 2wd Blazer P/N QFS-A822HV.
AEM
(30-4110) UEGO Air/Fuel Ratio Gauge
Summit Racing SUM-326943780-2F Forged Pistons + 2cc dome Bore 3.780.
My compression will be 10.6.1 CR.

Custom engine cover for TBSS intake manifold.
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Camshaft from 2004 LS6 Corvette P/N 12565308.
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Suspension
Front
Belltech spindles P/N.2102 and 2/3-in drop springs P/N.23228.
Rear
Belltech 3-in drop leaf springs P/N.5964. with 1-in lowering block with2 Degree Taper P/N 6002.
Sitting on Vision-Torque 20x8.5 & 235/35/R20 Tires.
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Installed new flex plate and torqued also change fuel rails to non-return style decided to go with the Corvette fuel filter with the built-in return.

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Fix that ugly hole in the side of the engine cover.
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Getting There.
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LS to S10 oil sending unit. M16 x 1/8 NIP to 1/8 NIP to 1/4 FIP.

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LS to S10 oil sending unit. M16 x 1/8 NIP to 1/8 NIP to 1/4 FIP.
A 1999-2000 4.8L/5.3L sending unit is a single wire M16 threaded sending unit (SMP part # PS303-ACDelco D1818A) no adapter needed. I'm putting in pressure sender extension. I'll post a picture as soon as all the ferrel's show up.

View attachment 361778
A 1999-2000 4.8L/5.3L sending unit is a single wire M16 threaded sending unit (SMP part # PS303-ACDelco D1818A) no adapter needed. I'm putting in pressure sender extension. I'll post a picture as soon as all the ferrel's show up.
Will it work with the S10 / Sonoma gauge and give a correct psi reading?
Will it work with the S10 / Sonoma gauge and give a correct psi reading?
That's the one CPW told me to use. My son has a 94 6.5L TD. He built an OPS extension for that, because they are problematic on those. I decided to do that for mine too using the ACDelco D1819A. The OE sender for my 2000 S10 2.2L/4.3L
That's the one CPW told me to use. My son has a 94 6.5L TD. He built an OPS extension for that, because they are problematic on those. I decided to do that for mine too using the ACDelco D1819A. The OE sender for my 2000 S10 2.2L/4.3L
Thanks that's good to know.
I'm using the 5.3/4.8 sender as well, but learned from a very trusted source that it isn't super accurate. It will still tell you if there's pressure or not, but the value isn't correct.

If I were to do it again, I'd keep the pressure sensor that goes to the computer (but not the gauges) in the factory location and use an adapter block at the oil cooler ports for the S10 sender.
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I'm using the 5.3/4.8 sender as well, but learned from a very trusted source that it isn't super accurate. It will still tell you if there's pressure or not, but the value isn't correct.

If I were to do it again, I'd keep the pressure sensor that goes to the computer (but not the gauges) in the factory location and use an adapter block at the oil cooler ports for the S10 sender.
How far off is the PSI on the Ls oil pressure sensor compared to the S10?
3
Started to mount my oil catch can and I cleaned and painted the steam Port tube.
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here is the picture of that oil pressure switch extension, I have not put the ground wire on yet.
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here is the picture of that oil pressure switch extension, I have not put the ground wire on yet. View attachment 361932
I see they just put a standard ring terminal on the end over the fitting try not to flex it too much those things like to break. They should have put a braided ground wire with a heavy duty ring on there instead of the standard ring terminal. I've seen too many ring terminals fell in my line of work snapping off between the hoop and the crimp. Vibration is the ring terminals worst enemy.
This is a prototype & that is a good idea. The braided ground wires I've seen still have a crimped ring terminal on both end's. We are kicking around a soldered ground wire for the next one. I also found some Gates 4LOLA hose that will be a little more flexible as well. It's a 300psi working pressure and 1200psi burst, instead of 500psi working w/1600psi burst.
This is a prototype & that is a good idea. The braided ground wires I've seen still have a crimped ring terminal on both end's. We are kicking around a soldered ground wire for the next one. I also found some Gates 4LOLA hose that will be a little more flexible as well. It's a 300psi working pressure and 1200psi burst, instead of 500psi working w/1600psi burst.
Remote mounting the sending units a good idea so if it goes bad you don't have to take the intake off to replace it. Had to replace one on my 4.3 a couple months ago had to take the stupid distributor out to replace it. But that's GM for you making it fun.
How far off is the PSI on the Ls oil pressure sensor compared to the S10?
This is the same information Grant has shared with me in the past. He did some legitimate testing between the sensors, so it's not hearsay coming from him.


This is the same information Grant has shared with me in the past. He did some legitimate testing between the sensors, so it's not hearsay coming from him.


Thank you for the info. I'm finally at the point in my build where I can pull the frame out drop the engine and transmission in and see where I need the trim the fat from the frame to make everything fit.
3
The oil catch can is ready to go.
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Been a little busy.

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