I have a 2007.
Had 81,000 miles and 530 engine hours when I bought it.
Right away I re-loomed the entire wire harness in the engine compartment and the replaced the wire looms to the O2 sensors along with a few other wires for the transmission. Unplugged every wire connector and added dialectical grease to the electrical plugs.
Of course several oil changes, fresh diff fluid and so on.
At around 83,000 miles the intake valve for the Active fuel management got stuck in the closed position, was able to pull the intake and whack the lifter back into the lock position. Then added a program to permanently disable the AFM. Runs perfect now.
Most recently I have a engine light that has been on and Im guessing it is likely a speed sensor in the transmission or at one of the wheels.
Not really gonna mess with it until next year when it gets closer to time for State inspection.
I picked up my retired police Tahoe for 3700 and after taxes and title transfer was about 4300.
The doors on most of these Tahoes are pretty heavy and I have seen a lot of them that have cracks at the hinges, Might wanna look in that area if you go look at one.
My Tahoe had the driver front door hyper extended, You can hardly notice unless you get right up on it.
The story was that a officer was slamming on the brakes while opening the door.
I think personally every little battle wound on a retired police Tahoe only gives it character.
The holes in the dash, the dents and dings it has all tell a story.
Just understand that these retired police cars have a different ECM program than your typical grocery getter.
The night time automatic lights are disabled, no interior lights when doors are opened, no daytime front running lights, along with a few other things, O and no parameters on top end. Which means they will run to top end unlike a grocery getter which it limited.
Also keep in mind that if ever you have your retired police Tahoe reflashed by a dealer you will likely lose all of the police parameters on the ECm and will not ever be able to get it switched back to Police parameter.
The dealer can switch your ECM to grocery getter but cannot switch it to Police parameters without a lot of legal mumbo jumbo stuff.
Every month I'll watch a few auctions just to see what the 2007 to 2014 Police Tahoes are selling for.
Ive seen on many occasions Police Tahoes sell at a auction and right away be put on CL for nearly double and believe it or not people then buy them for sometimes double.
I would say buying a retired Police Tahoe will come down to mileage and the year models, I would keep in mind that sellers other than a municipality will tell buyers all day long that the Tahoe they are selling was a supervisor unit.
That is the biggest bunch meaningless Crap.
Even municipalities sometimes do not even know or disclose something like that.
Even if a retired Police Tahoe was solely used by a supervisor that really would not change much of anything about how the unit was used.
A supervisor unit can still get involved in high speed chases, still sits idling along with many many other Police supervisor duties.
The notion that a supervisor unit is somehow gonna be a better, more well taken care of unit is absolutely ridiculous.
The people that will argue this are the ones that have a so called supervisor unit or are the people trying to make a few extra bucks trying to sell one.
Bottom line
A PPV Tahoe is a PPV Tahoe.
You can get maintenance records all day long for a retired police Tahoe.
Try going to the Police station an getting records of how many police pursuits that supervisor unit has been involved in and how many times that supervisor unit was used by other officers that might have needed a unit to drive for a shift.
I hope that my experiences with retired police Tahoes helps you in finding a retired Police Tahoe.