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#1
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I just installed the 2011 LML hydroboost in my 07 LBZ due to my factory one leaking. The install was straightforward but a problem I have had right away is intermittent brake lights, trailer brake controller and sometimes it will not shift out of park. All symptoms of the brake light switch not getting complete contact. Has anyone else done this swap and experienced these problems? If so, how did you fix the situation? Thanks in advance.
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#2
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Did the exact same swap with no problems. You might of accidentally messed with a wire(s) in the process.
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LBZ 2006 GMC cc/sb HSP s366sxe, w/ ppe up pipes, AFE intercooler, 5" FLOW PRO, fass 150, 72" trac bars Overloads pulled, 2" drop shackles, torsion key bolts pulled, on 285/55/20 All Rare Parts front end, DHD brace EFI live and built trans by Diesel Day Dreams |
#3
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When I swapped mine I noticed the LML booster had a smaller diameter hole where it connects to the brake pedal/mounts the brake switch. Yours may be a bit tighter than other vehicles causing the push rod to not travel far enough to contact the brake switch. Drill it slightly larger.
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Dustin '03 Silverado LB7 GT3788/CT6x88mm compounds _ 60's _ duals _ fingers _ 6480af '77 K-10 52"/56" front/rear leaf springs and rear shackle flip: 8" lift total _ D60/14blt 4:56s _ 40" Swamper IROK's _ 383 w/nitrous _ SM465 _ 208tcase '97 Cadillac Deville Morimoto Mini 5000k projector headlight conversion _ 500watts in the trunk _ 20's _ Flowmasters _ Tuned ECM _ Rear mount turbo in the works.... ![]() |
#4
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06 Silverado 4x4 CC/SB 06 Express 2500 Duramax Van "The Dumpster" ![]() |
#5
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#6
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Good info this should be added to the other hydroboost thread. I hope I don't have this issue, really don't wanna remove it again.
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Alex LBZ CCSB 4x4 EFI Live RDL Y-bridge 166,000 miles Sold 2003 C&C lb7/zf6 276,000 miles LBZ/ZF6/4x4 Conversion |
#7
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You don't have to remove it. Just unhook the rod from the brake pedal and hold it with a pair of vice grips. It can be drilled in the truck.
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06 Silverado 4x4 CC/SB 06 Express 2500 Duramax Van "The Dumpster" ![]() |
#8
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Good call, I love this forum.
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Alex LBZ CCSB 4x4 EFI Live RDL Y-bridge 166,000 miles Sold 2003 C&C lb7/zf6 276,000 miles LBZ/ZF6/4x4 Conversion |
#9
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As for the swap, I am happy with the improvement in braking. I’m not sure if it was because of the new design or just because my old one was leaking. Either way, thanks again for the great info and time saved! |
#10
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I need to do this to my regular cab so it stops better...
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2010 GMC 1500 RCSB Denali Clone < lifted 22's/33's, Kooks, Magnaflow, 5.3, 6l80, TVS1900 @ 15#'s, BTR top end and boost cam, Trunion upgrade, 90mm, 10% over, 2.8 griptec, 65lb sticks, Mayhem built/tuned. 2016 LML CCSB Denali < Lifted 22's/35's, Fox 2.0 < I officially need help. ![]() |
#11
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I know the info is out there but just to confirm other posts, I went with GM part number 178-0853. It was less than $200 to my door with no core charge.
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