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94 c2500 6.5, 94 k3500 6.5, 97 K3500 6.5, 07 2500hd duramax
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Discussion Starter · #1 ·
I have a 1994 c2500 light duty(does not have that 1 year only pump), clean truck but injection pump is tired and engine has blow by. I picked up a motor out of a 97 c3500HD with 70k and a brand new injection pump on it. I swapped everything from my 94 onto this motor except the injection pump. My question is will I have a issue running this 97 injection pump in my 94?
 

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I have a 1994 c2500 light duty(does not have that 1 year only pump), clean truck but injection pump is tired and engine has blow by. I picked up a motor out of a 97 c3500HD with 70k and a brand new injection pump on it. I swapped everything from my 94 onto this motor except the injection pump. My question is will I have a issue running this 97 injection pump in my 94?
Welcome to DieselPlace

1994 was the transition year for the injection pump. If your injection pump is the 5068 ( identified on the metal tag located on the injection pump) then your Injection pump replacement has to be the 5068.

If your injection pump is the 5521 then you can use the 97 injection pump on your 94'
 
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94 c2500 6.5, 94 k3500 6.5, 97 K3500 6.5, 07 2500hd duramax
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4 Posts
Discussion Starter · #3 ·
Welcome to DieselPlace

1994 was the transition year for the injection pump. If your injection pump is the 5068 ( identified on the metal tag located on the injection pump) then your Injection pump replacement has to be the 5068.

If your injection pump is the 5521 then you can use the 97 injection pump on your 94'
Thanks for the info. I had one place tell me the 5068 was only used on 3500HD trucks, and another place tell me it was on multiple models. I’ll dig out my old pump tomorrow and check the numbers
 

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Thanks for the info. I had one place tell me the 5068 was only used on 3500HD trucks, and another place tell me it was on multiple models. I’ll dig out my old pump tomorrow and check the numbers
They were mainly for the 3500HD trucks but it's always best to verify your pump
 
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94 c2500 6.5, 94 k3500 6.5, 97 K3500 6.5, 07 2500hd duramax
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4 Posts
Discussion Starter · #5 ·
So the current pump is a ds4 - 5521 & I want to replace it with acdelco ds4 - 19209059
 

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Answer is in the last sentence on Post #2.
 
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