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Swapped a 5.3 for a 4.8 and poser steering isn't working…

Customer Question
Swapped a 5.3...

Swapped a 5.3 for a 4.8 and poser steering isn't working consistently, Got the air out and drove well. parked it and later on restart no power assist while backing out of the drive until I got to 1200 to 1500 rpm. after that is was ok. I did figure out that its going through an idle relearn so during part of that it was idling about 500 rpm

Mechanic's Assistant: Is the power loss consistent, or does it fluctuate?

At first it was fluctuating but that was low fluid level and pump cavitation getting the fluid foamy. I got that corrected then it worked well for a short drive. brought it back to add coolant and let it set to cool off. This happened a few hours later when I went to drive it again.

Mechanic's Assistant: What is the model/year of your Chevy?

06 Silverado

Mechanic's Assistant: Are you fixing your Silverado yourself? What have you tried so far?

I put a used 5.3 engine in place of a 4.8 with 275,000 miles. Used the pump with the 5.3 that has about 120,000. Didn't have any issues with the previous pump but the fluid was dark and smelly.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Not that I can think of

Submitted: 5 months ago.Category: Chevy
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Answered in 3 minutes by:
3/11/2018
Chevy Mechanic: Mechanic01, ASE Certified Technician replied 5 months ago
Mechanic01
Mechanic01, ASE Certified Technician
Category: Chevy
Satisfied Customers: 3,741
Experience: Owner at Baltic investments
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Hello my name is ***** ***** welcome to just answers! I will be assisting you with all of your vehicle questions today. Give me one moment while I review your question and come back with a answer. Please be aware I do not know your skill level or abilities so I will be asking a lot of questions and in a lot of cases we will respond to each other quite a lot before we find a solution. As far as phone calls are concerned that is the system prompting you, not me, and they do cost more money, I prefer text but in some cases a phone call is required. If I don’t answer right away or quickly in conversation I am helping another customer or have stepped out for a moment and will respond as soon as I can. Ok lets get started!

Sounds like you just havent worked all the air out, did you jack it up and do a wheel to wheel 20 -40 times turn?

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