2004 suburban with bad 5.3. Swap to 4.8 I have?

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2004 suburban with bad 5.3. Swap to 4.8 I have? #434909 11/26/19 01:35 PM
Joined: Nov 2019 Posts: 1 Amarillo, tx Jtomwalker89 OP Grease Monkey
OP Jtomwalker89 Grease Monkey Joined: Nov 2019 Posts: 1 Amarillo, tx	I’ve got a 2004 suburban with a bad 5.3doesnt run. I have a good 4.8 out of a Silverado that won’t cost me any money. Yes I realize it’s stepping down in power but it doesn’t have any power right now.would It be as simple as taking off the wiring harness, intake ect and put on the 4.8? Would it run that way with the 5.3 computer? Or would I have to retune? I’ve heard from different shops and dyno tuners both ways.

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Re: 2004 suburban with bad 5.3. Swap to 4.8 I have? Jtomwalker89 #434910 11/26/19 02:23 PM
Joined: Jan 2008 Posts: 828 Likes: 6 iowa dens41 ChatMaster - 750
dens41 ChatMaster - 750 Joined: Jan 2008 Posts: 828 Likes: 6 iowa	I would think it would be a good chance it would do ok with the 5.3 ECM. We used to figure if the cubic inch was within 10% the sensors could adapt for that much change. I would try it and you could always have it reprogrammed. Dens Chevys 1927 Speedster 1928 coupe 1941street rod 1947Fleetline 4 door 1949 1/2 ton Pickup (sold) 1954 210 4 door 1972 Monte Carlo 2003 Corvette convt..

Re: 2004 suburban with bad 5.3. Swap to 4.8 I have? Jtomwalker89 #434947 11/27/19 12:45 AM
Joined: May 2019 Posts: 76 Phoenix, AZ. Old49er Shade Tree Mechanic
Old49er Shade Tree Mechanic Joined: May 2019 Posts: 76 Phoenix, AZ.	2004 Suburban is way too new for this site but there are guys waiting in line to answer that question here.... https://www.gm-trucks.com/forums/

Re: 2004 suburban with bad 5.3. Swap to 4.8 I have? Jtomwalker89 #434952 11/27/19 07:44 AM
Joined: Nov 2002 Posts: 7,472 Likes: 26 merrimack nh m006840 ChatMaster - 7,000
m006840 ChatMaster - 7,000 Joined: Nov 2002 Posts: 7,472 Likes: 26 merrimack nh	This thread may be more appropriate if placed in the 1990 and up forum. As noted in the Chat page header: "Vintage Chevrolet Club - Chatter Forums The VCCA is nonprofit organization dedicated to the preservation, restoration and enjoyment of all Chevrolets and GMCs." Hopefully the change to the new logo will help to dispel the idea that only really old cars are welcome here. Steve D

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