6.5L Turbo Diesel - Tech Support - Troubleshooting - Performance [Archive]

88 Suburban 6.2 to 6.5 Optimizer upgrade - Banks Sidewinder and Serpentine Belt? (3 replies)
Fuel Leak from FFM (2 replies)
Unable to pull obd1 codes (3 replies)
PMD finally failing? (4 replies)
Glow plug issue (2 replies)
Larger head bolts (5 replies)
no start (6 replies)
6.5 blowing Blue. (17 replies)
Dual Idler Gear Drive search (5 replies)
1992 6.5 crank no start (56 replies)
2001 chevy 3500 6.5 diesel (17 replies)
Engine stand (9 replies)
1995 K2500 pickup no start (5 replies)
My version of "bullet proofing" a 6.5 (3 replies)
Fuel lift pump wiring diagram (3 replies)
Phone Calls - that begin with "My 6.5 won't start."... (9 replies)
95 6.5 diesel and PMD (3 replies)
Shut down ??? (10 replies)
180* t stat (3 replies)
6.5 runs great cold but smokes and stumbles when warm (42 replies)
A/C compressor question. (11 replies)
Oil Pump Shaft Retainer (1 replies)
No overdrive after injection pump swap (28 replies)
95 K3500 runs hot in hot weather (5 replies)
Crossover corrosion. (6 replies)
94 Injection Pump,what pumps can be used? (5 replies)
Lift Pump power 94 3500HD ? (28 replies)
96 AC compressor failure, truck stuck, HT or HT6 compressor? (0 replies)
New tool arrived (7 replies)
Head Gasket (1 replies)
1997 C2500 6.5Turbo Diesel won't start (9 replies)
P0216 b (2 replies)
Seized injection pump (11 replies)
2000 6.5 Crank no start (2 replies)
Engine Stumbles at Cruise Until it Warms Up (12 replies)
'94 K2500 keeps blowing 25a front axle engagement actuator fuse(s). (4 replies)
1994 6.5 diesel won’t rev over 2500 rpm (8 replies)
Almost ready to have my 6.5 towed _ No Fire (3 replies)
Need help identifying 6.5 blocks (6 replies)
Bolt torque..... (4 replies)
My "Twisted" P400 build (18 replies)
"free" 599 (14 replies)
Glow plug relay question (25 replies)
Can I hone just 1 cylinder? (59 replies)
New Fuel Lines? (2 replies)
6.5L P400 turbo diesel HP (6 replies)
Idle surge - dangerous!! What is going on? (4 replies)
Over-cooling ??? (13 replies)
98 GMC Suburban Revival (204 replies)
Transmission doesn't change the gears - limp mode? (10 replies)
6.5 block manufacturing specs (3 replies)
ISO 6.5 Oil filter adapter o-rings/gasket (3 replies)
1996 6.5 Diesel Fuel Filter 101 (6 replies)
Mystery Fuel Leak and Knocking noise (8 replies)
94 vaccum pump delete (8 replies)
ISO: '94 K2500 parking brake handle/cable assy. (2 replies)
ISO of belt tension pulley WITH shoulders... (7 replies)
Oil pump drive tach plug part number (6 replies)
Help! This worth $5000? (7 replies)
Interesting 6.5 problem (7 replies)
Do we to add Zinc to an oil change ? (5 replies)
No black smoke? (1 replies)
Piston Ring Selection (7 replies)
6.5td stalling (8 replies)
New Injectors (7 replies)
6.5L Turbo Diesel Blazer Project (198 replies)
Resistor in an aftermarket PMD? (6 replies)
Help With Power Steering Bolts (7 replies)
The ol' Tahoe is down for the count - coolant in cylinder(s) (244 replies)
cranking issue / no start (8 replies)
Starter laboring ....now not even clicking ~ (27 replies)
Flowmaster is all i hear other guys recomend for our diesel. (2 replies)
HELP!!!!!power steering connector from the steering column to the cooler........ (2 replies)
Transmission Overdrive (26 replies)
Need help DTC P0278 (5 replies)
6.5 diesel power steering/brake problems (2 replies)
DB2 Conversion on ODB2 4x4 with 4L80E Trans (1 replies)
Please help and thanks for the accept. GMC 3500 not staying running (24 replies)
Noises from vacuum pump (1 replies)
Glow plugs just quit working (10 replies)
1998 Chevy 3500 6.5 injector pump leaking (2 replies)
Let’s talk P400 (5 replies)
Just Bought 2000 3500HD with Everything Stock--Need Advice on Gauges and/or Tuner (6 replies)
Does Removing the Cat Converter Cause Problems with Engine Computer, etc.? (2 replies)
Bolts for "Turbo Power 6.5" cover/ Cooler Size help (17 replies)
Tach not interchangeable (1 replies)
Help (8 replies)
Engine shutting of (11 replies)
Arp head studs (6 replies)
Glow plugs died randomly!! Please help (9 replies)
Cold weather fuel knock (5 replies)
Newbie to 6.5 have questions (22 replies)
Cutting off then trouble starting (10 replies)
Sputtering after road bump (6 replies)
New Starter? (10 replies)
I bought an Optimizer NAVSTAR (79 replies)
Another 506 bites the dust (7 replies)
Its winter again Thermostats, (3 replies)
1998 gmc3500hd duel fuel tank (4 replies)
96 GMC Sierra 6.5 turbo diesel (2 replies)
Weird 6.5 4 bolt coolant crossover? Wtf? (2 replies)
Timing set replacement questions (9 replies)
6.5 TD Refresher+Mods (15 replies)
Why are 6.5 quieter then 6.2? (4 replies)
6.2 IP on 6.5? (0 replies)
Clear codes with fuses? (1 replies)
Might be PMD but seems like it isn't (2 replies)
Help..! 95 6.5 Chevy Cuts Out... what would you do? (8 replies)
6.5 Alternator question (5 replies)
Best engine options (8 replies)
Difference between bosch 0430211097 and Bosch 0432217276 injectors (3 replies)
6.5 turbo oil drain question (3 replies)
Another "fuel in the valley" thread..worth pulling lower intake? (2 replies)
6.5 cracked heads/cracked precups hood? (7 replies)
Ultimate 506 block? Possible? (2 replies)
Seriously disappointed (13 replies)
2000 Chevy 6.5 turbo diesel lose of power and stalling (3 replies)
Connector help. (2 replies)
Starter issue - (3 replies)
A blue unicorn? (5 replies)
6.2 Lift pump on 6.5? (4 replies)
6.2 to 6.5 (2 replies)
New Alternator, no working Tachometer (3 replies)
S242 hot terminal (3 replies)
A/C Control panel for 1995 (9 replies)
2000 GMC 6.5 intermittent Stalling/Loss of Power to Lift Pump (10 replies)
ABS - Code 37 (5 replies)
Regarding '97 Cooling Mod (12 replies)
wont start after de-farm truck (17 replies)
Cutting off but will start back up (8 replies)
Dtc 13 (20 replies)
Hahahahaha need more fuel (1 replies)
93 6.5 cooling upgrade kits? (5 replies)
How much fuel mm 6.5 stock? (0 replies)
New Vacuum Pump - now no cruise control? (5 replies)
I own 1994 Chevy Suburban 2500 4x4 6.5 Turbo Diesel (2 replies)
Diesel Injector Pump Replacement - Crank Pulley won't rotate (3 replies)
Next step in upgrades (3 replies)
Loss of all electrical power (2 replies)
6.5L diesel excessive exhaust pressure (20 replies)
Tuners (6 replies)
Help me Identify Part Name (6 replies)
Erratic engine operation (6 replies)
OBD2 won't work with '94 truck (1 replies)
Alternate locations to install oil press gauge? (10 replies)
Cooling air going wrong direction? (1 replies)
In need of help! Will pay or buy a gift for the one to solve this puzzle. (6 replies)
Filter breakage (3 replies)
Engine Died, Cranks but No Start (24 replies)
DIY - Injector Pump Replacement (5 replies)
6.5 questions (12 replies)
6.5 turbo diesel RV (11 replies)
Waste gate control and idle question (6 replies)
Ingector pump timing and not changing gear (4 replies)
4L80e extra filtration unit? (6 replies)
Really confused here. Oil cooler and radiator questions. (10 replies)
6.5 Won't Start When Hot (5 replies)
93 3500 - First Diesel/Truck, Warm Start Problem (8 replies)
94 6.5 Hard Start, Sputtering Issues (3 replies)
Has anyone adjusted the GM '97 fan clutch? (2 replies)
1995 6.5 turbo diesel suburban doesnt start when hot (4 replies)
Not getting fuel to my injectors my 6.5l k3500 (9 replies)
truck running hot with a load on (8 replies)
New optimizer Heads ID help (3 replies)
New to the forum have an odd question (1 replies)
94 6.5 cranks normally but no start (2 replies)
1994 c3500hd black smoke ?? (1 replies)
1996 turbo diesel wont start!! (4 replies)
6.5 white smoke from #2 problem (6 replies)
TECH 2 1994 6.5 Timing Help (14 replies)
Engine idles for a minute then dies after start up. (3 replies)
Smoky Startup (2 replies)
One extreme to the next (9 replies)
Starting Gremlin (7 replies)
94 Gmc 6.5 not getting fuel to my Injectors (0 replies)
Heat Shield Under Intake (1 replies)
3k Mile trip on 295k 6.5 (4 replies)
PMD and Injection Pump (1 replies)
95 6.5 need answers new to diesels (2 replies)
Fuel injector Line Bracket (0 replies)
Interchangeable (0 replies)
Very high compression- what's going on? (8 replies)
Trouble with the 6.5 odd hesitation (1 replies)
Remove OPS (14 replies)
99 6.5 in a 95 truck (4 replies)
5th wheel capacity (2 replies)
Replacement Stock Front Bumper (4 replies)
1994 6.5 water flow diagrams (23 replies)
New to diesels (1 replies)
Check engine light (3 replies)
belt broke causing issues including low oil pressure (9 replies)
6.5 diesel won’t take any throttle (2 replies)
2000 K3500 6.5td surges/idles high and smokes, undriveable.... (11 replies)
Towing Power (or lack thereof) (8 replies)
Where in the US are there great 6.2/6.5L Diesel Repair Shops? (1 replies)
What in the US are there quality 6.2/6.5 repair shops? (0 replies)
97 C2500 losing fuel pressure (5 replies)
Weird noise, almost like a rod knock (13 replies)
What have I done... (32 replies)
Starter Issues (15 replies)
94 6.5l runs but jumps up and down when throttle is applied (3 replies)
The '99 Burb cranks, smokes, no start (6 replies)
Out of ideas trying to start a 98 (8 replies)
Lift pump wiring (4 replies)
6.5 starts, exhaust comes out from turbo area then stalls (2 replies)
Super 60 Turbo?? (3 replies)
1993 chevy 3500 diesel 6.5 no crank no start (2 replies)
Glow plugs again (5 replies)
New lift pump (6 replies)
Inspecting Accelerator Pedal Position (APP) on 98 Chevy Silverado (0 replies)
Crank no start (21 replies)
Throttle issues and shutting down (11 replies)
2001 6.5l intermittent cut out and now won’t start. (7 replies)
Could it just be old fuel (4 replies)
99 6.5 to 93 6.5 mechanical (5 replies)
Best injector pump from online (4 replies)
6.5 trouble shooting (10 replies)
1995 6.5 crank/no start (18 replies)
6.5L 1997 electric diagram (1 replies)
6.5 turbo starting issues (3 replies)
1993 6.5 wont start new injection pump (18 replies)
Fuel in oil (1 replies)
1996 6.5 diesel keeps stalling (2 replies)
injector pump ? (5 replies)
6.5l turbo 1993 wont crank over (1 replies)
97 3500 6.5 running rough (8 replies)
2002/2003 GMC 3500 Savana cutaway/shortbus (2 replies)
99 6.5, new to this forum (2 replies)
Heard a sound like crumpling a plastic bottle, then a major fuel leak from bell.... (4 replies)
ignition switch (4 replies)
No start and of course I need to get somewhere (6 replies)
Please help!! 6.5 Td 4l80e issue (35 replies)
6.5 surging, black smoke (2 replies)
Be sure to check your starter bracket!! (9 replies)
DB2 4911 pump rebuild. (6 replies)
Realistic Hauling Expectations (10 replies)
High Capacity Oil Filters (5 replies)
Surging issue on my 93 dually. (10 replies)
No Start when warm (10 replies)
1992 GMC 2500 6.5 Turbo Diesel surging and stalling (0 replies)
Idle vibration (9 replies)
Need help deciding: first time 6.5 purchase. (6 replies)
Military 6.5 information needed (6 replies)
Oil in coolant (5 replies)
6.5 intermittent no start help (5 replies)
RPM Jumps from 1200 to 2000 (6 replies)
How many bullets does it take to make you feel better... (5 replies)
Instrument panel cluster pinout (3 replies)
Vacuum pump pulley (19 replies)
94 6.5 Diesel pulling multiple codes (1 replies)