Rayyy
Full Access Member
Doing a tune up on my 2001 Yukon XL 5.3
Is it possible to swap in round coils into a truck that came with the square ones?
My Yukon came with the square coils (D581), however, I understand that the “newer design” ignition coils (D585) are a bit "hotter" and began getting installed into Chevy/GMC trucks in 2003? (which is why many people swap them into LS motors).
O'Reilly, Amazon, Ebay, etc.. all state that both types of coils will fit my truck (00-02 GMC/Chevy).
I know that the round (D585) coils will require slightly longer plug wires [9748GG vs the 9748HH for the square (D581) coils].
I realize swapping these in will require a different mounting bracket (part 10457736), but isn’t expensive and piece of fake to bolt in.
The dwell settings are different for the “round” D585 coils, which cost $139 per coil vs $69 for the older “square” D581 ones.
Will the newer style coils improve performance? Better gas mileage?
Thanks in advance to anyone who chimes in.
Is it possible to swap in round coils into a truck that came with the square ones?
My Yukon came with the square coils (D581), however, I understand that the “newer design” ignition coils (D585) are a bit "hotter" and began getting installed into Chevy/GMC trucks in 2003? (which is why many people swap them into LS motors).
O'Reilly, Amazon, Ebay, etc.. all state that both types of coils will fit my truck (00-02 GMC/Chevy).
I know that the round (D585) coils will require slightly longer plug wires [9748GG vs the 9748HH for the square (D581) coils].
I realize swapping these in will require a different mounting bracket (part 10457736), but isn’t expensive and piece of fake to bolt in.
The dwell settings are different for the “round” D585 coils, which cost $139 per coil vs $69 for the older “square” D581 ones.
Will the newer style coils improve performance? Better gas mileage?
Thanks in advance to anyone who chimes in.
