5.3 into trans am

**jiveass** · 03-07-2012, 10:55 AM

I just purchased a 5.3 from a 2004 silverado to put in my trans am. Just wondering if i need to use my ls1 oil pan and other stuff on this engine. I know i have to swap intakes, but what else?

**tatertot91** · 03-07-2012, 11:40 AM

Oil pan and accessories, pretty sure the water pump is different and alternator/accessories are located differently.

**flybird** · 03-07-2012, 11:42 AM

+ harness, computer. Or flash and reprogram the computer.

**jiveass** · 03-07-2012, 12:11 PM

stock tune should work ...i know the harness will. only other thing i need to do that i know of is drill and tap the hole for the alternator bracket

**Firebirdjones** · 03-07-2012, 12:25 PM

Swap everything over, from the oil pan to the accessories.

Stock tune "might" get it started and running, but I wouldn't run around with it anymore than you have to. A 5.3 will require completely different timing and fuel maps.

**pajeff02** · 03-07-2012, 12:51 PM

Is the crank reluctor still 24x on an '04? I have no idea.

**jiveass** · 03-07-2012, 12:53 PM

anyone know the turnaround for a mail order tune from frost?

**pajeff02** · 03-07-2012, 12:57 PM

3-5 days total once you drop it in the mail. He generally gets them back out within a day of receipt.

**jiveass** · 03-07-2012, 01:00 PM

yea its a 24 tooth still...i made sure to research that ..(after i already paid for it) lol...sounds like ill be contacting frost...

**Spikito** · 03-07-2012, 01:33 PM

i ordered a new PCM from him, didnt mail mine, i had it in my hands in just over 24 hours from the time i paid, and Jiveass, I'm not too far from you

**jiveass** · 03-08-2012, 04:10 AM

glad to hear that....i want this thing on the road asap!

**flybird** · 03-08-2012, 06:25 AM

Hope everything works out! Post some pics and vids when your done!

Just dont drive on that normal tune, you'll get all sorts of malfunctions! (ask me how I know...)

**jiveass** · 03-19-2012, 05:57 AM

got my engine saturday....

my son removing the intakeand exhaust manifolds

my son cleaning the engine

and a few hrs later...threw a quick spray can job on it...nothin too fancy.

i stll need to swap my fbody oil pan, replace the transmission seals, and drill and tap alternator hole....after that...it all goes together and back into the car...

**pajeff02** · 03-19-2012, 08:26 AM

Looking good.

**jrbonds** · 03-19-2012, 10:14 AM

Looks good! I got my lq9 in over the weekend. I'm waiting on my tranny to be finished.

**tatertot91** · 03-22-2012, 01:49 PM

Looks pretty good mike
Look forward to seeing it in the car

**jiveass** · 03-22-2012, 05:13 PM

Originally Posted by tatertot91

Looks pretty good mike
Look forward to seeing it in the car

you and me both...had to thoroughly clean my oil pan in the varsol tank today to get all the metal shavings out....still need to drill and tap alt hole...got all the accessory brackets cleaned up...hoping to have it in this weekend...now if someone can answer my oil pan gasket question in the external engine section lol

**jiveass** · 03-22-2012, 05:14 PM

Originally Posted by jrbonds

Looks good! I got my lq9 in over the weekend. I'm waiting on my tranny to be finished.

didnt you just replace your engine?

**JacobLS1** · 03-23-2012, 07:25 PM

Hate to be a noob. But what is the reason to put a 5.3 in your T/A?

**jrbonds** · 03-23-2012, 08:06 PM

Originally Posted by jiveass:2758854

Originally Posted by jrbonds

Looks good! I got my lq9 in over the weekend. I'm waiting on my tranny to be finished.

didnt you just replace your engine?

Yep. But it was a used engine, and sadly 3 weeks of it working in my car. The oil pump went bad and I spun some rod bearings. This time I got a lq9 and no parts other than the intake, oil pan, block, etc is used.