JB5 vs JB7 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

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JB5 vs JB7

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03-23-2023, 02:55 PM	#1
Wobpb377 Registered User Join Date: Aug 2019 Location: Aiea,HI Posts: 187	JB5 vs JB7 How do you tell what brake system my truck has. It’s a 1986 Suburban 3/4t 454 with 400 trans. The SPID doesn’t list JB7 on there. Sites like napa or autozone say with our without JB7 for my truck. Maybe a visual inspection? Last edited by Wobpb377; 03-23-2023 at 03:10 PM.

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