Most of the Tow vehicles in Chennai are the part of the Police (or in their Duty) only. Which are normally used to tow away the vehicles from No-Parking zones across the city. Predominantly this happens towards the month-ends & month startings, for obvious reasons.
Not many such vehicles ply for the Paid duties for the public to use their services to move their vehicles / or use them as a garage owner to move your clients vehicles.